.gitlab-ci.dhall

-let Prelude =
-        env:DHALL_PRELUDE
-      ? https://raw.githubusercontent.com/dhall-lang/dhall-lang/v20.1.0/Prelude/package.dhall
-          sha256:26b0ef498663d269e4dc6a82b0ee289ec565d683ef4c00d0ebdd25333a5a3c98
-
-let HsSrc =
-      < FromHackage : { name : Text, version : Text }
-      | FromGit :
-          { url : Text, revision : Optional Text, subdir : Optional Text }
-      >
-
-let Modifiers =
-      { Type = { doJailbreak : Bool, doCheck : Bool }
-      , default = { doJailbreak = True, doCheck = False }
-      }
-
-let Attr = λ(a : Type) → { mapKey : Text, mapValue : a }
-
-let HsPkg = {source : HsSrc, modifiers : Modifiers.Type }
-
-let Attr
-    : ∀(x : Type) → Type
-    = λ(x : Type) → { mapKey : Text, mapValue : x }
-
-let Step = { script : List Text }
-
-let toStep
-    : ∀(id : Text) → ∀(prefix : Text) → ∀(x : Text) → Attr Step
-    = λ(id : Text) →
-      λ(prefix : Text) →
-      λ(x : Text) →
-        { mapKey = id
-        , mapValue.script = [ "nix build -L .#${prefix}.${x}" ]
-        }
-
-let input = Prelude.Map.keys Text HsPkg ./manifest.dhall
-
-let packages =
-      Prelude.List.map
-        (Text)
-        (Attr Step)
-        ( λ(x : Text) →
-            toStep "Package ${x}" "packages.x86_64-linux" x
-        )
-        (input : List Text)
-
-in  packages

.gitlab-ci.yml

 stages:
-- generate
-- check
+- build
+- devour
+- cachix
 
-generate-flake-ci:
-  stage: generate
-  script: nix run ".#horizon-gen-gitlab-ci" > flake-ci.yml
-  artifacts:
-    paths:
-      - flake-ci.yml
+build:
+  stage: build
+  script:
+  - nix build .#packages.$SYSTEM.$PACKAGE -L
+  parallel:
+    matrix:
+      - SYSTEM:
+         - aarch64-darwin
+         - x86_64-linux
+        PACKAGE:
+         - aeson
+         - beam-postgres
+         - composite-base
+         - dhall
+         - hedgehog
+         - hoauth2-providers
+         - log-effectful
+         - persistent-postgresql
+         - polysemy
+         - servant
+         - souffle-haskell
+         - sydtest
+         - tasty
+         - wai-app-static
+         - warp
+      - SYSTEM:
+         - x86_64-linux
+        PACKAGE:
+         - streamly
 
-flake-ci:
-  stage: check
-  trigger:
-    include:
-      - artifact: flake-ci.yml
-        job: generate-flake-ci
-    strategy: depend
+devour:
+  stage: devour
+  script:
+  - nix build github:srid/devour-flake#packages.$SYSTEM.default -L --no-link --print-out-paths --override-input flake . --keep-going
+  parallel:
+    matrix:
+      - SYSTEM:
+         - aarch64-darwin
+         - x86_64-linux
+
+cachix:
+  stage: cachix
+  rules:
+    - if: $CI_COMMIT_REF_PROTECTED == "true"
+  script:
+    - nix-shell -p cachix --command "nix build github:srid/devour-flake#packages.$SYSTEM.default -L --no-link --print-out-paths --override-input flake . | xargs cat | cachix push horizon"
+  parallel:
+    matrix:
+      - SYSTEM:
+         - aarch64-darwin
+         - x86_64-linux

ChangeLog.md

+# ChangeLog for horion-platform
+
+## unstable-2023-02-20
+
+* Initial unstable tag. Handwritten policy added.

LICENSE

+MIT License
+
+Copyright (c) 2022-2023 Homotopic.Tech Ltd
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

-# Haskell Horizon Platform
+# Horizon Haskell Platform
 
 [horizon-haskell.net](https://horizon-haskell.net).
 
-Horizon is a haskell package set targetting new builds of GHC.
+horizon-platform is a haskell package set targetting new builds of GHC. This package set extends [horizon-platform](https://gitlab.horizon-haskell.net/package-sets/horizon-platform).
 
-## Updating the package set
 
-The package set is generated from the `manifest.dhall` using the following command:
+The following things are expected to be here:
+* aeson
+* beam-postgres
+* composite-base
+* dhall
+* hedgehog
+* hoauth2-providers
+* log-effectful
+* persistent-postgresql
+* polysemy
+* servant
+* souffle-haskell
+* streamly
+* sydtest
+* tasty
+* wai-app-static
+* warp
+
+## Updating the Package Set
+
+Generating the nix expressions for the package set is a two step process.
+
+1. Edit the `horizon.dhall` file.
+2. Generate the nix expressions with
+
+```
+nix run develop/#horizon-gen-nix -- -jN
+```
+
+You can edit the `horizon.dhall` file in one of two ways: manually using a text
+editor, or programatically using `horizon-shell`.
+
+If you want to bumping everything listed in the `horizon.dhall` file to the latest
+bounds, run
+
+```
+nix run develop/#try-to-upgrade-everything
+```
+
+### Using horizon-shell.
+
+To use `horizon-shell`.
 
 ```
-nix run .#horizon-gen-nix
+nix run develop/#horizon-shell
 ```
 
-This will generate both the `pkgs` folder and the `overlay.nix`. If you want to
-regenerate a particular package in `pkgs`, delete that file from `pkgs`. To
-regenerate the entire package set from scratch, delete the `pkgs` folder.
+This is a haskell interpreter with a few shortcut functions available. Running
+`tryToUpgradeEverything` will poll hackage for any potential updates and add
+them to the dhall file. This will only modify the dhall, not the nix
+expressions. You must remember to run `nix run develop/#horizon-gen-nix`
+afterwards.
+
+To quickly add a new package to the dhall, use the `addHackage` function. For example
+`addHackage "optics"`.
+
+## Tweaking & Hacking
 
 If you need to do additional manual overrides to the nix code, such as
-`addPkgconfigDepends`, edit the `configuration.nix` overlay, which is applied
-after `overlay.nix`.
+`addPkgconfigDepends`, edit the `configuration/common.nix` overlay, which is
+applied over the generated derivations.
+
+## Feedback
+
+To build all packages, run
+
+```
+nix run develop/#feedback -- build
+```
+
+## Hoogle
+
+To get a hoogle instance for the entire package set, you can run:
+
+```
+nix run .#apps.x86_64-linux.run-hoogle
+```

configuration.nix

-{ pkgs, ... }:
-
-with pkgs.haskell.lib;
-
-final: prev: {
-
-  saltine = addPkgconfigDepend prev.saltine pkgs.libsodium;
-
-  libsodium = prev.callPackage ./pkgs/libsodium.nix { inherit (pkgs) libsodium; };
-
-}

configuration/aarch64-darwin.nix

+{ pkgs, haskellLib }:
+
+with pkgs.haskell.lib;
+
+final: prev: {
+
+  alsa-core = null;
+
+  alsa-mixer = null;
+
+  iwlib = null;
+
+  libsystemd-journal = null;
+
+  llvm-hs = null;
+
+  sdl2-mixer = null;
+
+  streamly = null;
+
+}
+

configuration/aarch64-linux.nix

+{ pkgs, haskellLib }:
+
+with haskellLib;
+
+final: prev: {
+
+  dhall-docs = null;
+
+  hfsevents = null;
+  
+  mmark = null;
+
+  stripeapi = null;
+}

configuration/common.nix

+{ pkgs, haskellLib }:
+
+with haskellLib;
+
+final: prev: {
+
+  cheapskate = null;
+
+  hasql-explain-tests = null;
+
+  sandwich = null;
+
+  text-icu = prev.callPackage ../pkgs/text-icu.nix { icu-i18n = pkgs.icu; };
+
+  thyme = null;
+
+  tmp-postgres = null;
+
+  X11-xft = addPkgconfigDepends prev.X11-xft [ pkgs.expat pkgs.xorg.libXau pkgs.xorg.libXdmcp ];
+
+}

configuration/x86_64-darwin.nix

+{ pkgs, haskellLib }:
+
+with pkgs.haskell.lib;
+
+final: prev: {
+
+  alsa-core = null;
+
+  alsa-mixer = null;
+
+  hfsevents = prev.callPackage ../pkgs/hfsevents.nix {
+    Cocoa = pkgs.darwin.apple_sdk.frameworks.Cocoa;
+    CoreServices = pkgs.darwin.apple_sdk.frameworks.CoreServices;
+  };
+
+  iwlib = null;
+
+  libsystemd-journal = null;
+
+  sdl2-mixer = null;
+
+  hinotify = final.hfsevents;
+
+}
+

configuration/x86_64-linux.nix

+{ pkgs, haskellLib }:
+
+with haskellLib;
+
+final: prev: {
+
+  hfsevents = null;
+
+}

develop/flake.nix

+{
+
+  nixConfig = {
+    extra-substituters = "https://horizon.cachix.org";
+    extra-trusted-public-keys = "horizon.cachix.org-1:MeEEDRhRZTgv/FFGCv3479/dmJDfJ82G6kfUDxMSAw0=";
+  };
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    horizon-develop-flake.url = "git+https://gitlab.horizon-haskell.net/nix/horizon-develop-flake";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    inputs@
+    { self
+    , flake-parts
+    , nixpkgs
+    , ...
+    }:
+    flake-parts.lib.mkFlake { inherit inputs; }
+      {
+        systems = [
+          "aarch64-darwin"
+          "x86_64-darwin"
+          "x86_64-linux"
+        ];
+        imports = [
+          inputs.horizon-develop-flake.flakeModule
+        ];
+      };
+}

flake.lock

 {
   "nodes": {
-    "all-cabal-hashes": {
-      "flake": false,
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
       "locked": {
-        "lastModified": 1667742759,
-        "narHash": "sha256-PniFwhuGiX32rPHNyqgx8nn1No39SP89CHSoBuJOXlE=",
-        "owner": "commercialhaskell",
-        "repo": "all-cabal-hashes",
-        "rev": "eaf3b72978447f236e82c0de1d6f770e3dec00a7",
+        "lastModified": 1738453229,
+        "narHash": "sha256-7H9XgNiGLKN1G1CgRh0vUL4AheZSYzPm+zmZ7vxbJdo=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "32ea77a06711b758da0ad9bd6a844c5740a87abd",
         "type": "github"
       },
       "original": {
-        "owner": "commercialhaskell",
-        "ref": "hackage",
-        "repo": "all-cabal-hashes",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
         "type": "github"
       }
     },
-    "flake-utils": {
+    "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib_2"
+      },
       "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "lastModified": 1717285511,
+        "narHash": "sha256-iKzJcpdXih14qYVcZ9QC9XuZYnPc6T8YImb6dX166kw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2a55567fcf15b1b1c7ed712a2c6fadaec7412ea8",
         "type": "github"
       },
       "original": {
-        "id": "flake-utils",
-        "type": "indirect"
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
       }
     },
-    "flake-utils_2": {
+    "flake-parts_3": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib_3"
+      },
       "locked": {
-        "lastModified": 1644229661,
-        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "lastModified": 1717285511,
+        "narHash": "sha256-iKzJcpdXih14qYVcZ9QC9XuZYnPc6T8YImb6dX166kw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2a55567fcf15b1b1c7ed712a2c6fadaec7412ea8",
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
         "type": "github"
       }
     },
-    "get-flake": {
+    "horizon-advance": {
+      "inputs": {
+        "flake-parts": [
+          "horizon-advance",
+          "horizon-core",
+          "flake-parts"
+        ],
+        "horizon-core": "horizon-core",
+        "horizon-hoogle": "horizon-hoogle_2",
+        "nixpkgs": "nixpkgs_4"
+      },
       "locked": {
-        "lastModified": 1644686428,
-        "narHash": "sha256-zkhYsURWFrvEZLkIoBeqFBzSu+cA2u5mo6M8vq9LN7M=",
-        "owner": "ursi",
-        "repo": "get-flake",
-        "rev": "703f15558daa56dfae19d1858bb3046afe68831a",
-        "type": "github"
+        "lastModified": 1719751316,
+        "narHash": "sha256-exJ80zZPyiSxiYQb4IreK7LDpjfBLOCPb77QUn3TGR8=",
+        "ref": "lts/ghc-9.10.x",
+        "rev": "36784235da4dd828b3e139a855dc8410fff91376",
+        "revCount": 259,
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/package-sets/horizon-advance"
       },
       "original": {
-        "owner": "ursi",
-        "repo": "get-flake",
-        "type": "github"
+        "ref": "lts/ghc-9.10.x",
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/package-sets/horizon-advance"
       }
     },
-    "horizon-gen-nix": {
-      "flake": false,
+    "horizon-build-packages": {
+      "inputs": {
+        "flake-parts": [
+          "horizon-advance",
+          "horizon-core",
+          "horizon-build-packages",
+          "horizon-ghc",
+          "flake-parts"
+        ],
+        "horizon-ghc": "horizon-ghc",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1718969469,
+        "narHash": "sha256-0Q8v/yNwcLZy0znegLXx/SQmbfd2d/4TBSrFYh7g7+0=",
+        "ref": "refs/heads/master",
+        "rev": "23fa82740dc197706a3737c8830b724ccabafac4",
+        "revCount": 96,
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/package-sets/horizon-build-packages"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/package-sets/horizon-build-packages"
+      }
+    },
+    "horizon-core": {
+      "inputs": {
+        "flake-parts": "flake-parts_2",
+        "horizon-build-packages": "horizon-build-packages",
+        "horizon-hoogle": "horizon-hoogle",
+        "nixpkgs": "nixpkgs_3"
+      },
       "locked": {
-        "lastModified": 1667577671,
-        "narHash": "sha256-rDbpc4sbCmcT7oP+eD557zrlCYCrYumyiDJucOTNsTs=",
+        "lastModified": 1718977916,
+        "narHash": "sha256-sssWF/XjZga4asgwvovPLAbg8E2EyLDQOYSFgUbKg6c=",
         "ref": "refs/heads/master",
-        "rev": "9d3a1f027f2852dbc896d06c089556134035ddba",
-        "revCount": 31,
+        "rev": "81674e75e63548341ebe0cb94127044255affb55",
+        "revCount": 1375,
         "type": "git",
-        "url": "https://gitlab.homotopic.tech/horizon/horizon-gen-nix"
+        "url": "https://gitlab.horizon-haskell.net/package-sets/horizon-core"
       },
       "original": {
         "type": "git",
-        "url": "https://gitlab.homotopic.tech/horizon/horizon-gen-nix"
+        "url": "https://gitlab.horizon-haskell.net/package-sets/horizon-core"
       }
     },
-    "lint-utils": {
+    "horizon-ghc": {
       "inputs": {
-        "flake-utils": "flake-utils_2",
+        "flake-parts": "flake-parts_3",
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1655192403,
-        "narHash": "sha256-XyKDvRGDh8VXA6zN8DUTnDaTMrk0MxMKg70MaAX1A2Y=",
+        "lastModified": 1718969245,
+        "narHash": "sha256-eeMsOK3Hmm23SH45GdbuWRtpEcMWZPC/JCYvKL2LOos=",
+        "ref": "refs/heads/master",
+        "rev": "0bcfe994903359aef81338915706bf6b2f38aaa4",
+        "revCount": 109,
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/ghc/horizon-ghc"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/ghc/horizon-ghc"
+      }
+    },
+    "horizon-hoogle": {
+      "locked": {
+        "lastModified": 1701521742,
+        "narHash": "sha256-huf/95jYL7mY0AHSziJYXx4m/sP+G+YAbJb+Q5Ph/Jg=",
+        "ref": "refs/heads/master",
+        "rev": "ddf3b08c6458c1a9e0d881f968c050bc828b9b8e",
+        "revCount": 2,
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/nix/horizon-hoogle"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/nix/horizon-hoogle"
+      }
+    },
+    "horizon-hoogle_2": {
+      "locked": {
+        "lastModified": 1701521742,
+        "narHash": "sha256-huf/95jYL7mY0AHSziJYXx4m/sP+G+YAbJb+Q5Ph/Jg=",
+        "ref": "refs/heads/master",
+        "rev": "ddf3b08c6458c1a9e0d881f968c050bc828b9b8e",
+        "revCount": 2,
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/nix/horizon-hoogle"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://gitlab.horizon-haskell.net/nix/horizon-hoogle"
+      }
+    },
+    "horizon-hoogle_3": {
+      "locked": {
+        "lastModified": 1701521742,
+        "narHash": "sha256-huf/95jYL7mY0AHSziJYXx4m/sP+G+YAbJb+Q5Ph/Jg=",
         "ref": "refs/heads/master",
-        "rev": "a7ae54afdc4c05a5aabf202d5a76d02705eb6147",
-        "revCount": 28,
+        "rev": "ddf3b08c6458c1a9e0d881f968c050bc828b9b8e",
+        "revCount": 2,
         "type": "git",
-        "url": "https://gitlab.homotopic.tech/nix/lint-utils"
+        "url": "https://gitlab.horizon-haskell.net/nix/horizon-hoogle"
       },
       "original": {
         "type": "git",
-        "url": "https://gitlab.homotopic.tech/nix/lint-utils"
+        "url": "https://gitlab.horizon-haskell.net/nix/horizon-hoogle"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1644525281,
-        "narHash": "sha256-D3VuWLdnLmAXIkooWAtbTGSQI9Fc1lkvAr94wTxhnTU=",
+        "lastModified": 1718928808,
+        "narHash": "sha256-MjVGflb3qXOrJRTJ5siQZHYuMCsRHaqYgTSKSik+/sE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "48d63e924a2666baf37f4f14a18f19347fbd54a2",
+        "rev": "564000ae34c6af8549f3729051bbae33403e298c",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-unstable",
+        "ref": "haskell-updates",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1738452942,
+        "narHash": "sha256-vJzFZGaCpnmo7I6i416HaBLpC+hvcURh/BQwROcGIp8=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/072a6db25e947df2f31aab9eccd0ab75d5b2da11.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/072a6db25e947df2f31aab9eccd0ab75d5b2da11.tar.gz"
+      }
+    },
+    "nixpkgs-lib_2": {
+      "locked": {
+        "lastModified": 1717284937,
+        "narHash": "sha256-lIbdfCsf8LMFloheeE6N31+BMIeixqyQWbSr2vk79EQ=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/eb9ceca17df2ea50a250b6b27f7bf6ab0186f198.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/eb9ceca17df2ea50a250b6b27f7bf6ab0186f198.tar.gz"
+      }
+    },
+    "nixpkgs-lib_3": {
+      "locked": {
+        "lastModified": 1717284937,
+        "narHash": "sha256-lIbdfCsf8LMFloheeE6N31+BMIeixqyQWbSr2vk79EQ=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/eb9ceca17df2ea50a250b6b27f7bf6ab0186f198.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/eb9ceca17df2ea50a250b6b27f7bf6ab0186f198.tar.gz"
+      }
+    },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1665830552,
-        "narHash": "sha256-qel2bZ9TqfW8WzWCWdjuCy4bVFhhGsEeqFv/bj1ka2s=",
+        "lastModified": 1718928808,
+        "narHash": "sha256-MjVGflb3qXOrJRTJ5siQZHYuMCsRHaqYgTSKSik+/sE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "564000ae34c6af8549f3729051bbae33403e298c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "haskell-updates",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1718928808,
+        "narHash": "sha256-MjVGflb3qXOrJRTJ5siQZHYuMCsRHaqYgTSKSik+/sE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "564000ae34c6af8549f3729051bbae33403e298c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "haskell-updates",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_4": {
+      "locked": {
+        "lastModified": 1719706517,
+        "narHash": "sha256-ynXAAr5AJgTQHQAJW4GH3i8auqnZVzcjCokZMdEKjcs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "01da4c59cc4879540b7a5d73230475b4616a0dc8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "haskell-updates",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_5": {
+      "locked": {
+        "lastModified": 1739138025,
+        "narHash": "sha256-M4ilIfGxzbBZuURokv24aqJTbdjPA9K+DtKUzrJaES4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "26b7e6ab6a864c3e7e077bcb27a49f0480b9894a",
+        "rev": "b2243f41e860ac85c0b446eadc6930359b294e79",
         "type": "github"
       },
       "original": {
@@ -130,12 +309,10 @@
     },
     "root": {
       "inputs": {
-        "all-cabal-hashes": "all-cabal-hashes",
-        "flake-utils": "flake-utils",
-        "get-flake": "get-flake",
-        "horizon-gen-nix": "horizon-gen-nix",
-        "lint-utils": "lint-utils",
-        "nixpkgs": "nixpkgs_2"
+        "flake-parts": "flake-parts",
+        "horizon-advance": "horizon-advance",
+        "horizon-hoogle": "horizon-hoogle_3",
+        "nixpkgs": "nixpkgs_5"
       }
     }
   },

flake.nix

 {
+
+  description = "Horizon Haskell Platform";
+
+  nixConfig = {
+    extra-substituters = "https://horizon.cachix.org";
+    extra-trusted-public-keys = "horizon.cachix.org-1:MeEEDRhRZTgv/FFGCv3479/dmJDfJ82G6kfUDxMSAw0=";
+  };
+
   inputs = {
-    all-cabal-hashes = {
-      url = "github:commercialhaskell/all-cabal-hashes/hackage";
-      flake = false;
-    };
-    get-flake.url = "github:ursi/get-flake";
-    lint-utils.url = "git+https://gitlab.homotopic.tech/nix/lint-utils";
-    horizon-gen-nix = {
-      flake = false;
-      url = "git+https://gitlab.homotopic.tech/horizon/horizon-gen-nix";
-    };
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    horizon-advance.url = "git+https://gitlab.horizon-haskell.net/package-sets/horizon-advance?ref=lts/ghc-9.10.x";
+    horizon-hoogle.url = "git+https://gitlab.horizon-haskell.net/nix/horizon-hoogle";
     nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
   };
-  outputs = inputs@{ self, all-cabal-hashes, nixpkgs, flake-utils, get-flake, horizon-gen-nix, lint-utils, ... }:
-    flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
-      let
-        pkgs = import nixpkgs { inherit system; };
-        horizon-gen-nix-app = get-flake horizon-gen-nix;
-        configuration = import ./configuration.nix { inherit inputs pkgs; };
-        hsPkgs = pkgs.callPackage (nixpkgs + /pkgs/development/haskell-modules) {
-          buildHaskellPackages = pkgs.haskell.packages.ghc942;
-          configurationCommon = { pkgs, haskellLib }: self: super: { };
-          ghc = pkgs.haskell.compiler.ghc942;
+
+  outputs = inputs:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "aarch64-darwin"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "x86_64-linux"
+      ];
+      imports = [
+        inputs.horizon-hoogle.flakeModule
+      ];
+      perSystem = { pkgs, config, system, ... }:
+        with pkgs.lib;
+        let
           haskellLib = pkgs.haskell.lib;
-          initialPackages = import ./overlay.nix;
-          compilerConfig = pkgs.callPackage (nixpkgs + /pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix) { haskellLib = pkgs.haskell.lib; };
+          modifiers = import ./modifiers.nix { inherit pkgs; };
+          overrides = composeManyExtensions [
+            (import ./overlay.nix { inherit pkgs; f = modifiers; })
+            (import ./configuration/common.nix { inherit pkgs haskellLib; })
+            (import (./configuration + "/${system}.nix") { inherit pkgs haskellLib; })
+          ];
+
+          legacyPackages = inputs.horizon-advance.legacyPackages.${system}.extend overrides;
+
+          packages = filterAttrs (_: isDerivation) legacyPackages;
+
+        in
+        {
+
+          inherit legacyPackages;
+
+          inherit packages;
+
         };
-        hp' = pkgs.lib.filterAttrs
-          (n: v: v != null
-            && builtins.typeOf v == "set"
-            && pkgs.lib.hasAttr "type" v
-            && v.type == "derivation"
-            && v.meta.broken == false)
-          hsPkgs;
-        horizon-gen-gitlab-ci = pkgs.writers.writeBashBin "gen-gitlab-ci" "${pkgs.dhall-json}/bin/dhall-to-yaml --file .gitlab-ci.dhall";
-      in
-      {
-        apps = {
-          horizon-gen-nix = horizon-gen-nix-app.outputs.apps.${system}.default;
-          horizon-gen-gitlab-ci = {
-            type = "app";
-            program = "${horizon-gen-gitlab-ci}/bin/gen-gitlab-ci";
-          };
-        };
-        checks = {
-          dhall-format = lint-utils.outputs.linters.x86_64-linux.dhall-format ./.;
-          nixpkgs-fmt = lint-utils.outputs.linters.x86_64-linux.nixpkgs-fmt ./.;
-        };
-        packages = hp';
-      });
+    };
 }

modifiers.nix

+{ pkgs, ... }:
+
+with pkgs.lib;
+
+_: prev: name: v: if hasAttr name prev then warn "${name} exists in parent set" v else v