feat: refactor tooling

17 files changed, 1447 insertions, 192 deletions

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..2d185af
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,23 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+max_line_length = 100
+trim_trailing_whitespace = true
+
+[justfile]
+indent_size = 4
+indent_style = space
+
+[*.{md,nix}]
+indent_size = 2
+indent_style = space
+
+[*.md]
+max_line_length = 80
+
+[{.envrc,flake.lock}]
+# We really don't care for this file
+max_line_length = 1000
diff --git a/.envrc b/.envrc
index a5dbbcb..cb982f0 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1,9 @@
-use flake .
+watch_file flake.nix
+watch_file flake.lock
+
+DEVENV_ROOT_FILE="$(mktemp)"
+printf %s "$PWD" > "$DEVENV_ROOT_FILE"
+if ! use flake . --override-input devenv-root "file+file://$DEVENV_ROOT_FILE"
+then
+  echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
+fi
diff --git a/.gitignore b/.gitignore
index 10bb410..9536941 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,11 @@
-/.direnv
-/result
-/target
+# Development environment
+.devenv
+.direnv
+.pre-commit-hooks.yaml
+
+# Nix
+result
+result/
+
+# Rust
+target/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 120000
index 0000000..b6d928e
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1 @@
+/nix/store/39hvkv9hgacrxnij0c1vw4lvg47lkn9x-pre-commit-config.json
\ No newline at end of file
diff --git a/.rustfmt.toml b/.rustfmt.toml
index ebf394c..3a60dda 100644
--- a/.rustfmt.toml
+++ b/.rustfmt.toml
@@ -5,7 +5,7 @@ format_strings = true
 group_imports = "StdExternalCrate"
 hard_tabs = true
 hex_literal_case = "Upper"
-imports_granulatiry = "Crate"
+imports_granularity = "Crate"
 reorder_impl_items = true
 reorder_modules = true
 use_field_init_shorthand = true
diff --git a/Cargo.lock b/Cargo.lock
index cf7799b..48c51eb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "bitflags"
-version = "2.4.1"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
 [[package]]
 name = "mos6502"
diff --git a/Cargo.toml b/Cargo.toml
index a9fe318..532c12d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-bitflags = "2.4.1"
+bitflags = "2.6.0"
 
 [lints.rust]
 missing_copy_implementations = "warn"
@@ -14,14 +14,14 @@ missing_debug_implementations = "warn"
 missing_docs = "warn"
 single_use_lifetimes = "warn"
 unsafe_code = "warn"
-unused = "warn"
+unused = { level = "warn", priority = -1 }
 
 [lints.clippy]
-complexity = "warn"
-nursery = "warn"
-pedantic = "warn"
-perf = "warn"
-suspicious = "warn"
+complexity = { level = "warn", priority = -1 }
+nursery = { level = "warn", priority = -1 }
+pedantic = { level = "warn", priority = -1 }
+perf = { level = "warn", priority = -1 }
+suspicious = { level = "warn", priority = -1 }
 alloc_instead_of_core = "warn"
 as_underscore = "warn"
 clone_on_ref_ptr = "warn"
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
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+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d39efa4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Nix Flake Template
+
+A flake template with direnv, devenv, and some responsible defaults.
diff --git a/flake.lock b/flake.lock
index 9489634..ae03792 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,55 +1,255 @@
 {
   "nodes": {
+    "cachix": {
+      "inputs": {
+        "devenv": "devenv_2",
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "git-hooks": [
+          "devenv",
+          "pre-commit-hooks"
+        ],
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1726520618,
+        "narHash": "sha256-jOsaBmJ/EtX5t/vbylCdS7pWYcKGmWOKg4QKUzKr6dA=",
+        "owner": "cachix",
+        "repo": "cachix",
+        "rev": "695525f9086542dfb09fde0871dbf4174abbf634",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "cachix",
+        "type": "github"
+      }
+    },
+    "cachix_2": {
+      "inputs": {
+        "devenv": "devenv_3",
+        "flake-compat": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "flake-compat"
+        ],
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "nixpkgs"
+        ],
+        "pre-commit-hooks": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "pre-commit-hooks"
+        ]
+      },
+      "locked": {
+        "lastModified": 1712055811,
+        "narHash": "sha256-7FcfMm5A/f02yyzuavJe06zLa9hcMHsagE28ADcmQvk=",
+        "owner": "cachix",
+        "repo": "cachix",
+        "rev": "02e38da89851ec7fec3356a5c04bc8349cae0e30",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "cachix",
+        "type": "github"
+      }
+    },
     "crane": {
-      "flake": false,
       "locked": {
-        "lastModified": 1699217310,
-        "narHash": "sha256-xpW3VFUG7yE6UE6Wl0dhqencuENSkV7qpnpe9I8VbPw=",
+        "lastModified": 1727974419,
+        "narHash": "sha256-WD0//20h+2/yPGkO88d2nYbb23WMWYvnRyDQ9Dx4UHg=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "d535642bbe6f377077f7c23f0febb78b1463f449",
+        "rev": "37e4f9f0976cb9281cd3f0c70081e5e0ecaee93f",
         "type": "github"
       },
       "original": {
         "owner": "ipetkov",
-        "ref": "v0.15.0",
         "repo": "crane",
         "type": "github"
       }
     },
-    "dream2nix": {
+    "devenv": {
       "inputs": {
+        "cachix": "cachix",
+        "flake-compat": "flake-compat_2",
+        "nix": "nix_3",
         "nixpkgs": [
-          "nci",
           "nixpkgs"
         ],
-        "purescript-overlay": "purescript-overlay",
-        "pyproject-nix": "pyproject-nix"
+        "pre-commit-hooks": "pre-commit-hooks_2"
       },
       "locked": {
-        "lastModified": 1707223475,
-        "narHash": "sha256-tDmoPA3gukJPfjR/pKl6hNcRP7cuEGw6ruoguHS4szo=",
-        "owner": "nix-community",
-        "repo": "dream2nix",
-        "rev": "936208ae7d88a178a0bcf7e6ac21bb6b87f6c8ea",
+        "lastModified": 1727963652,
+        "narHash": "sha256-os0EDjn7QVXL6RtHNb9TrZLXVm2Tc5/nZKk3KpbTzd8=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "cb0052e25dbcc8267b3026160dc73cddaac7d5fd",
         "type": "github"
       },
       "original": {
-        "owner": "nix-community",
-        "repo": "dream2nix",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "devenv-root": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-d6xi4mKdjkX2JFicDIv5niSzpyI0m/Hnm8GGAIU04kY=",
+        "type": "file",
+        "url": "file:///dev/null"
+      },
+      "original": {
+        "type": "file",
+        "url": "file:///dev/null"
+      }
+    },
+    "devenv_2": {
+      "inputs": {
+        "cachix": "cachix_2",
+        "flake-compat": [
+          "devenv",
+          "cachix",
+          "flake-compat"
+        ],
+        "nix": "nix_2",
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "nixpkgs"
+        ],
+        "pre-commit-hooks": [
+          "devenv",
+          "cachix",
+          "git-hooks"
+        ]
+      },
+      "locked": {
+        "lastModified": 1723156315,
+        "narHash": "sha256-0JrfahRMJ37Rf1i0iOOn+8Z4CLvbcGNwa2ChOAVrp/8=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "ff5eb4f2accbcda963af67f1a1159e3f6c7f5f91",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "devenv_3": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "cachix",
+          "flake-compat"
+        ],
+        "nix": "nix",
+        "nixpkgs": "nixpkgs",
+        "poetry2nix": "poetry2nix",
+        "pre-commit-hooks": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "cachix",
+          "pre-commit-hooks"
+        ]
+      },
+      "locked": {
+        "lastModified": 1708704632,
+        "narHash": "sha256-w+dOIW60FKMaHI1q5714CSibk99JfYxm0CzTinYWr+Q=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "2ee4450b0f4b95a1b90f2eb5ffea98b90e48c196",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "python-rewrite",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1673956053,
+        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
         "type": "github"
       }
     },
     "flake-parts": {
       "inputs": {
+        "nixpkgs-lib": [
+          "devenv",
+          "nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1712014858,
+        "narHash": "sha256-sB4SWl2lX95bExY2gMFG5HIzvva5AVMJd4Igm+GpZNw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "9126214d0a59633752a136528f5f3b9aa8565b7d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-parts_2": {
+      "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1706830856,
-        "narHash": "sha256-a0NYyp+h9hlb7ddVz4LUn1vT/PLwqfrWYcHMvFB1xYg=",
+        "lastModified": 1727826117,
+        "narHash": "sha256-K5ZLCyfO/Zj9mPFldf3iwS6oZStJcU4tSpiXTMYaaL0=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "b253292d9c0a5ead9bc98c4e9a26c6312e27d69f",
+        "rev": "3d04084d54bedc3d6b8b736c70ef449225c361b1",
         "type": "github"
       },
       "original": {
@@ -58,89 +258,375 @@
         "type": "github"
       }
     },
-    "mk-naked-shell": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_3": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "devenv",
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "libgit2": {
       "flake": false,
       "locked": {
-        "lastModified": 1681286841,
-        "narHash": "sha256-3XlJrwlR0nBiREnuogoa5i1b4+w/XPe0z8bbrJASw0g=",
-        "owner": "yusdacra",
-        "repo": "mk-naked-shell",
-        "rev": "7612f828dd6f22b7fb332cc69440e839d7ffe6bd",
+        "lastModified": 1697646580,
+        "narHash": "sha256-oX4Z3S9WtJlwvj0uH9HlYcWv+x1hqp8mhXl7HsLu2f0=",
+        "owner": "libgit2",
+        "repo": "libgit2",
+        "rev": "45fd9ed7ae1a9b74b957ef4f337bc3c8b3df01b5",
         "type": "github"
       },
       "original": {
-        "owner": "yusdacra",
-        "repo": "mk-naked-shell",
+        "owner": "libgit2",
+        "repo": "libgit2",
         "type": "github"
       }
     },
-    "nci": {
+    "mk-shell-bin": {
+      "locked": {
+        "lastModified": 1677004959,
+        "narHash": "sha256-/uEkr1UkJrh11vD02aqufCxtbF5YnhRTIKlx5kyvf+I=",
+        "owner": "rrbutani",
+        "repo": "nix-mk-shell-bin",
+        "rev": "ff5d8bd4d68a347be5042e2f16caee391cd75887",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rrbutani",
+        "repo": "nix-mk-shell-bin",
+        "type": "github"
+      }
+    },
+    "nix": {
       "inputs": {
-        "crane": "crane",
-        "dream2nix": "dream2nix",
-        "mk-naked-shell": "mk-naked-shell",
+        "flake-compat": "flake-compat",
         "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "cachix",
+          "devenv",
           "nixpkgs"
         ],
-        "parts": "parts",
-        "rust-overlay": "rust-overlay",
-        "treefmt": "treefmt"
+        "nixpkgs-regression": "nixpkgs-regression"
       },
       "locked": {
-        "lastModified": 1707372711,
-        "narHash": "sha256-VixqzHPc4VGd3TVcdTSufrpZ6wequ0a8BGSQOuxaFps=",
-        "owner": "yusdacra",
-        "repo": "nix-cargo-integration",
-        "rev": "eddee765f67966646c487f554fc843e8513aad28",
+        "lastModified": 1712911606,
+        "narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
+        "owner": "domenkozar",
+        "repo": "nix",
+        "rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
         "type": "github"
       },
       "original": {
-        "owner": "yusdacra",
-        "repo": "nix-cargo-integration",
+        "owner": "domenkozar",
+        "ref": "devenv-2.21",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "cachix",
+          "devenv",
+          "poetry2nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1688870561,
+        "narHash": "sha256-4UYkifnPEw1nAzqqPOTL2MvWtm3sNGw1UTYTalkTcGY=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "165b1650b753316aa7f1787f3005a8d2da0f5301",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
+    "nix2container": {
+      "inputs": {
+        "flake-utils": "flake-utils_3",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1724996935,
+        "narHash": "sha256-njRK9vvZ1JJsP8oV2OgkBrpJhgQezI03S7gzskCcHos=",
+        "owner": "nlewo",
+        "repo": "nix2container",
+        "rev": "fa6bb0a1159f55d071ba99331355955ae30b3401",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nlewo",
+        "repo": "nix2container",
+        "type": "github"
+      }
+    },
+    "nix_2": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "flake-compat"
+        ],
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "nixpkgs"
+        ],
+        "nixpkgs-regression": "nixpkgs-regression_2"
+      },
+      "locked": {
+        "lastModified": 1712911606,
+        "narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
+        "owner": "domenkozar",
+        "repo": "nix",
+        "rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
+        "type": "github"
+      },
+      "original": {
+        "owner": "domenkozar",
+        "ref": "devenv-2.21",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nix_3": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "flake-parts": "flake-parts",
+        "libgit2": "libgit2",
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-23-11": "nixpkgs-23-11",
+        "nixpkgs-regression": "nixpkgs-regression_3",
+        "pre-commit-hooks": "pre-commit-hooks"
+      },
+      "locked": {
+        "lastModified": 1727438425,
+        "narHash": "sha256-X8ES7I1cfNhR9oKp06F6ir4Np70WGZU5sfCOuNBEwMg=",
+        "owner": "domenkozar",
+        "repo": "nix",
+        "rev": "f6c5ae4c1b2e411e6b1e6a8181cc84363d6a7546",
+        "type": "github"
+      },
+      "original": {
+        "owner": "domenkozar",
+        "ref": "devenv-2.24",
+        "repo": "nix",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1707092692,
-        "narHash": "sha256-ZbHsm+mGk/izkWtT4xwwqz38fdlwu7nUUKXTOmm4SyE=",
-        "owner": "nixos",
+        "lastModified": 1692808169,
+        "narHash": "sha256-x9Opq06rIiwdwGeK2Ykj69dNc2IvUH1fY55Wm7atwrE=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "faf912b086576fd1a15fca610166c98d47bc667e",
+        "rev": "9201b5ff357e781bf014d0330d18555695df7ba8",
         "type": "github"
       },
       "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-23-11": {
+      "locked": {
+        "lastModified": 1717159533,
+        "narHash": "sha256-oamiKNfr2MS6yH64rUn99mIZjc45nGJlj9eGth/3Xuw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a62e6edd6d5e1fa0329b8653c801147986f8d446",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
         "repo": "nixpkgs",
+        "rev": "a62e6edd6d5e1fa0329b8653c801147986f8d446",
         "type": "github"
       }
     },
     "nixpkgs-lib": {
       "locked": {
-        "dir": "lib",
-        "lastModified": 1706550542,
-        "narHash": "sha256-UcsnCG6wx++23yeER4Hg18CXWbgNpqNXcHIo5/1Y+hc=",
+        "lastModified": 1727825735,
+        "narHash": "sha256-0xHYkMkeLVQAMa7gvkddbPqpxph+hDzdu1XdGPJR+Os=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/fb192fec7cc7a4c26d51779e9bab07ce6fa5597a.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/fb192fec7cc7a4c26d51779e9bab07ce6fa5597a.tar.gz"
+      }
+    },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "97b17f32362e475016f942bbdfda4a4a72a8a652",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
+    "nixpkgs-regression_2": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
         "type": "github"
       },
       "original": {
-        "dir": "lib",
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
+    "nixpkgs-regression_3": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1720386169,
+        "narHash": "sha256-NGKVY4PjzwAa4upkGtAMz1npHGoRzWotlSnVlqI40mo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "194846768975b7ad2c4988bdb82572c00222c0d7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1705856552,
-        "narHash": "sha256-JXfnuEf5Yd6bhMs/uvM67/joxYKoysyE3M2k6T3eWbg=",
+        "lastModified": 1717432640,
+        "narHash": "sha256-+f9c4/ZX5MWDOuB1rKoWj+lBNm0z0rs4CK47HBLxy1o=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "88269ab3044128b7c2f4c7d68448b2fb50456870",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1727802920,
+        "narHash": "sha256-HP89HZOT0ReIbI7IJZJQoJgxvB2Tn28V6XS3MNKnfLs=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "612f97239e2cc474c13c9dafa0df378058c5ad8d",
+        "rev": "27e30d177e57d912d614c88c622dcfdb2e6e6515",
         "type": "github"
       },
       "original": {
@@ -150,145 +636,150 @@
         "type": "github"
       }
     },
-    "parts": {
+    "poetry2nix": {
       "inputs": {
-        "nixpkgs-lib": [
-          "nci",
+        "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "cachix",
+          "devenv",
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1706830856,
-        "narHash": "sha256-a0NYyp+h9hlb7ddVz4LUn1vT/PLwqfrWYcHMvFB1xYg=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "b253292d9c0a5ead9bc98c4e9a26c6312e27d69f",
+        "lastModified": 1692876271,
+        "narHash": "sha256-IXfZEkI0Mal5y1jr6IRWMqK8GW2/f28xJenZIPQqkY0=",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "rev": "d5006be9c2c2417dafb2e2e5034d83fabd207ee3",
         "type": "github"
       },
       "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
         "type": "github"
       }
     },
-    "purescript-overlay": {
+    "pre-commit-hooks": {
       "inputs": {
+        "flake-compat": [
+          "devenv",
+          "nix"
+        ],
+        "flake-utils": "flake-utils_2",
+        "gitignore": [
+          "devenv",
+          "nix"
+        ],
         "nixpkgs": [
-          "nci",
-          "dream2nix",
+          "devenv",
+          "nix",
           "nixpkgs"
         ],
-        "slimlock": "slimlock"
+        "nixpkgs-stable": [
+          "devenv",
+          "nix",
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1696022621,
-        "narHash": "sha256-eMjFmsj2G1E0Q5XiibUNgFjTiSz0GxIeSSzzVdoN730=",
-        "owner": "thomashoneyman",
-        "repo": "purescript-overlay",
-        "rev": "047c7933abd6da8aa239904422e22d190ce55ead",
+        "lastModified": 1712897695,
+        "narHash": "sha256-nMirxrGteNAl9sWiOhoN5tIHyjBbVi5e2tgZUgZlK3Y=",
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "40e6053ecb65fcbf12863338a6dcefb3f55f1bf8",
         "type": "github"
       },
       "original": {
-        "owner": "thomashoneyman",
-        "repo": "purescript-overlay",
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
         "type": "github"
       }
     },
-    "pyproject-nix": {
-      "flake": false,
+    "pre-commit-hooks_2": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
       "locked": {
-        "lastModified": 1702448246,
-        "narHash": "sha256-hFg5s/hoJFv7tDpiGvEvXP0UfFvFEDgTdyHIjDVHu1I=",
-        "owner": "davhau",
-        "repo": "pyproject.nix",
-        "rev": "5a06a2697b228c04dd2f35659b4b659ca74f7aeb",
+        "lastModified": 1726745158,
+        "narHash": "sha256-D5AegvGoEjt4rkKedmxlSEmC+nNLMBPWFxvmYnVLhjk=",
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "4e743a6920eab45e8ba0fbe49dc459f1423a4b74",
         "type": "github"
       },
       "original": {
-        "owner": "davhau",
-        "ref": "dream2nix",
-        "repo": "pyproject.nix",
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
         "type": "github"
       }
     },
     "root": {
       "inputs": {
-        "flake-parts": "flake-parts",
-        "nci": "nci",
-        "nixpkgs": "nixpkgs",
+        "crane": "crane",
+        "devenv": "devenv",
+        "devenv-root": "devenv-root",
+        "flake-parts": "flake-parts_2",
+        "mk-shell-bin": "mk-shell-bin",
+        "nix2container": "nix2container",
+        "nixpkgs": "nixpkgs_3",
         "treefmt-nix": "treefmt-nix"
       }
     },
-    "rust-overlay": {
-      "flake": false,
+    "systems": {
       "locked": {
-        "lastModified": 1707358215,
-        "narHash": "sha256-Nuhi8KEJ2e+2nTimSyEIPqN5eh7ECVWd+AnPXG6L+SY=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "dd917bb1b67fc049fd56fe6de70266a9ab74a4aa",
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
         "type": "github"
       },
       "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
+        "owner": "nix-systems",
+        "repo": "default",
         "type": "github"
       }
     },
-    "slimlock": {
-      "inputs": {
-        "nixpkgs": [
-          "nci",
-          "dream2nix",
-          "purescript-overlay",
-          "nixpkgs"
-        ]
-      },
+    "systems_2": {
       "locked": {
-        "lastModified": 1688610262,
-        "narHash": "sha256-Wg0ViDotFWGWqKIQzyYCgayeH8s4U1OZcTiWTQYdAp4=",
-        "owner": "thomashoneyman",
-        "repo": "slimlock",
-        "rev": "b5c6cdcaf636ebbebd0a1f32520929394493f1a6",
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
         "type": "github"
       },
       "original": {
-        "owner": "thomashoneyman",
-        "repo": "slimlock",
+        "owner": "nix-systems",
+        "repo": "default",
         "type": "github"
       }
     },
-    "treefmt": {
+    "treefmt-nix": {
       "inputs": {
         "nixpkgs": [
-          "nci",
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1707300477,
-        "narHash": "sha256-qQF0fEkHlnxHcrKIMRzOETnRBksUK048MXkX0SOmxvA=",
-        "owner": "numtide",
-        "repo": "treefmt-nix",
-        "rev": "ac599dab59a66304eb511af07b3883114f061b9d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "treefmt-nix",
-        "type": "github"
-      }
-    },
-    "treefmt-nix": {
-      "inputs": {
-        "nixpkgs": "nixpkgs_2"
-      },
-      "locked": {
-        "lastModified": 1707300477,
-        "narHash": "sha256-qQF0fEkHlnxHcrKIMRzOETnRBksUK048MXkX0SOmxvA=",
+        "lastModified": 1727984844,
+        "narHash": "sha256-xpRqITAoD8rHlXQafYZOLvUXCF6cnZkPfoq67ThN0Hc=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "ac599dab59a66304eb511af07b3883114f061b9d",
+        "rev": "4446c7a6fc0775df028c5a3f6727945ba8400e64",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 7fda700..376233c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,74 +1,104 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
 {
-  description = "Logic table generator on the command line.";
+  description = "A MOS6502 emulator written in Rust.";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
-    flake-parts.url = "github:hercules-ci/flake-parts";
+    crane.url = "github:ipetkov/crane";
 
-    nci = {
-      inputs.nixpkgs.follows = "nixpkgs";
-      url = "github:yusdacra/nix-cargo-integration";
+    # devenv dependencies
+    devenv-root = {
+      url = "file+file:///dev/null";
+      flake = false;
     };
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    devenv.url = "github:cachix/devenv";
+    devenv.inputs.nixpkgs.follows = "nixpkgs";
+    nix2container.url = "github:nlewo/nix2container";
+    nix2container.inputs.nixpkgs.follows = "nixpkgs";
+    mk-shell-bin.url = "github:rrbutani/nix-mk-shell-bin";
 
+    # Custom template dependencies
     treefmt-nix.url = "github:numtide/treefmt-nix";
+    treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
   };
 
   outputs = inputs @ {
-    self,
+    crane,
     flake-parts,
-    nixpkgs,
-    nci,
-    treefmt-nix,
+    devenv-root,
+    ...
   }:
     flake-parts.lib.mkFlake {inherit inputs;} {
       imports = [
-        nci.flakeModule
-        treefmt-nix.flakeModule
+        inputs.devenv.flakeModule
+        inputs.treefmt-nix.flakeModule
       ];
 
-      systems = [
-        "x86_64-linux"
-      ];
+      systems = ["x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin"];
 
       perSystem = {
         config,
         pkgs,
-        system,
-        lib,
         ...
       }: let
-        crateOutputs = config.nci.outputs."mos6502";
+        craneLib = crane.mkLib pkgs;
+        src = craneLib.cleanCargoSource ./.;
+
+        commonArgs = {
+          inherit src;
+          strictDeps = true;
+        };
+
+        cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+
+        mos6502 = craneLib.buildPackage (commonArgs // {inherit cargoArtifacts;});
       in {
-        nci.projects.mos6502.path = ./.;
+        checks = {
+          inherit mos6502;
+          mos6502-clippy = craneLib.cargoClippy (commonArgs
+            // {
+              inherit cargoArtifacts;
+            });
+          mos6502-nextest = craneLib.cargoNextest (commonArgs
+            // {
+              inherit cargoArtifacts;
+              partitions = 1;
+              partitionType = "count";
+            });
+        };
 
-        # configure crates
-        nci.crates.mos6502 = {
-          depsDrvConfig.env = {
-            RUSTFLAGS = "-A missing-docs";
+        packages.default = mos6502;
+
+        devenv.shells.default = {
+          devenv.root = let
+            devenvRootFileContent = builtins.readFile devenv-root.outPath;
+          in
+            pkgs.lib.mkIf (devenvRootFileContent != "") devenvRootFileContent;
+
+          imports = [./nix/devenv.nix];
+
+          pre-commit.hooks.treefmt = {
+            enable = true;
+            packageOverrides.treefmt = config.treefmt.build.wrapper;
           };
+
+          name = "my-project";
         };
 
         treefmt = {
-          projectRootFile = "flake.nix";
+          # Checked by pre-commit.
+          flakeCheck = false;
+          flakeFormatter = true;
           programs = {
-            rustfmt = {
-              enable = true;
-              package = config.nci.toolchains.shell;
-            };
+            alejandra.enable = true;
+            rustfmt.enable = true;
+            statix.enable = true;
             taplo.enable = true;
           };
+          projectRootFile = "flake.nix";
         };
-
-        devShells.default = crateOutputs.devShell.overrideAttrs (_: {
-          buildInputs = with pkgs; [
-            bacon
-            gcc
-            mold
-          ];
-        });
-
-        packages.default = crateOutputs.packages.release;
       };
     };
 }
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..4394d18
--- /dev/null
+++ b/justfile
@@ -0,0 +1,3 @@
+[private]
+default:
+    just -l
diff --git a/nix/devenv.nix b/nix/devenv.nix
new file mode 100644
index 0000000..1d7c220
--- /dev/null
+++ b/nix/devenv.nix
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+_: {
+  # Language support
+  languages = {
+    rust.enable = true;
+  };
+
+  # Packages from nixpkgs.
+  packages = builtins.attrValues {};
+
+  # pre-commit hooks
+  pre-commit.hooks = {
+    deadnix.enable = true;
+    editorconfig-checker.enable = true;
+    markdownlint.enable = true;
+    statix.enable = true;
+  };
+}
diff --git a/src/cpu.rs b/src/cpu.rs
index b009160..8437d10 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 //! Implementation of the MOS 6502 CPU.
 
 use bitflags::bitflags;
diff --git a/src/instruction.rs b/src/instruction.rs
index 2744048..d3aa725 100644
--- a/src/instruction.rs
+++ b/src/instruction.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 //! Implementation of instructions for MOS 6502.
 
 /// List of all instructions for MOS 6502.
diff --git a/src/main.rs b/src/main.rs
index 003d198..4d64f3c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,11 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 //! 6502 Emulator written in Rust. Based off of information from Dave's playlist
-//! <https://www.youtube.com/playlist?list=PLLwK93hM93Z13TRzPx9JqTIn33feefl37> using the now defunct
-//! obelisk 6502 documentation.
+//! <https://www.youtube.com/playlist?list=PLLwK93hM93Z13TRzPx9JqTIn33feefl37>
+//! using the now defunct obelisk 6502 documentation.
 //!
-//! Many comments are sourced from the Obelisk 6502 documentation <https://web.archive.org/web/20210501031403/http://www.obelisk.me.uk/index.html>
+//! Many comments are sourced from the Obelisk 6502 documentation
+//! <https://web.archive.org/web/20210501031403/http://www.obelisk.me.uk/index.html>
 
 mod cpu;
 mod instruction;
diff --git a/src/memory.rs b/src/memory.rs
index d251231..3f1aadf 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 //! Implementation of memory for the MOS 6502.
 
 /// Maximum amount of memory that exists within the emulator.