one flake }:)

flake.nix

@@ -28,6 +28,9 @@
             compiler-nix-name = "ghc912";
             shell = {
               withHoogle = true;
+              inputsFrom = [
+                self.packages.${final.stdenv.hostPlatform.system}.runtime
+              ];
               tools = {
                 cabal = {};
                 haskell-language-server = {};

runtime/default.nix

@@ -0,0 +1,24 @@
+{ lib
+, rustPlatform
+, bdwgc
+, cmake
+, pkg-config
+}:
+
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "gyehoek-runtime";
+  version = "0.0.1";
+  src = ./.;
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+    outputHashes."bdwgc-alloc-0.6.13" =
+      "sha256-8/EZ9FThVVsdkwB+OIlNHQJxIr6DPf701Mlfq5U1j4E=";
+  };
+  nativeBuildInputs = [
+    pkg-config
+    cmake
+  ];
+  buildInputs = [
+    bdwgc
+  ];
+})

runtime/flake.lock

@@ -1,87 +0,0 @@
-{
-  "nodes": {
-    "fenix": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "rust-analyzer-src": "rust-analyzer-src"
-      },
-      "locked": {
-        "lastModified": 1779185128,
-        "narHash": "sha256-Kl2bkmwZJD3n2KWDxuIlturZ7emqRK+anpD1LmDwpmY=",
-        "owner": "nix-community",
-        "repo": "fenix",
-        "rev": "b7bd9323fe26a3b4f4bddbb2c2a1dacabced2f88",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "fenix",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1778869304,
-        "narHash": "sha256-30sZNZoA1cqF5JNO9fVX+wgiQYjB7HJqqJ4ztCDeBZE=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "d233902339c02a9c334e7e593de68855ad26c4cb",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "fenix": "fenix",
-        "nixpkgs": "nixpkgs",
-        "sydpkgs": "sydpkgs"
-      }
-    },
-    "rust-analyzer-src": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1779074864,
-        "narHash": "sha256-0M3WqsWmtXmv9Ev/vnFfCHosWvISDwiuuhQ104UO3CI=",
-        "owner": "rust-lang",
-        "repo": "rust-analyzer",
-        "rev": "cdfe408d4b436e806ff525cb3e67588a6a009ed1",
-        "type": "github"
-      },
-      "original": {
-        "owner": "rust-lang",
-        "ref": "nightly",
-        "repo": "rust-analyzer",
-        "type": "github"
-      }
-    },
-    "sydpkgs": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1778962331,
-        "narHash": "sha256-qMokSV7hsWYiDCkkBGyG0aD4Ds3JLzJzJ0Cp9f/spJU=",
-        "ref": "refs/heads/main",
-        "rev": "59d3a471cd960f9d1f6c645a4fe578a670848e9d",
-        "revCount": 41,
-        "type": "git",
-        "url": "https://git.deertopia.net/msyds/sydpkgs"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://git.deertopia.net/msyds/sydpkgs"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

runtime/flake.nix

@@ -1,70 +0,0 @@
-{
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    fenix = {
-      url = "github:nix-community/fenix";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-    sydpkgs = {
-      url = "git+https://git.deertopia.net/msyds/sydpkgs";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-  };
-
-  outputs = { self, nixpkgs, fenix, sydpkgs, ... }:
-  let
-    supportedSystems = [
-      "aarch64-darwin" "aarch64-linux"
-      "x86_64-darwin" "x86_64-linux"
-    ];
-
-    each-system = f: nixpkgs.lib.genAttrs supportedSystems (system: f rec {
-      pkgs = import nixpkgs {
-        inherit system overlays;
-      };
-      inherit (pkgs) lib;
-      inherit system;
-    });
-
-    overlays = [
-      (final: prev: {
-        inherit (sydpkgs.packages.${final.stdenv.hostPlatform.system})
-          bdwgc;
-      })
-      fenix.overlays.default
-    ];
-
-  in {
-    _pkgs = each-system ({ pkgs, ... }: pkgs);
-
-    packages = each-system ({ pkgs, ... }: {
-      default = pkgs.callPackage ./. {};
-    });
-
-    devShells = each-system ({ pkgs, lib, ... }: {
-      default = pkgs.mkShell {
-        RUSTFLAGS = "-L " + lib.makeLibraryPath [
-          pkgs.bdwgc
-        ];
-        packages = [
-          pkgs.pkg-config
-          pkgs.bdwgc
-          (pkgs.fenix.complete.withComponents [
-            "cargo" "clippy" "rust-src" "rustc" "rustfmt"
-          ])
-          pkgs.rust-analyzer-nightly
-          pkgs.cmake
-        ];
-      };
-    });
-  };
-
-  nixConfig = {
-    extra-substituters = [
-      "https://fenix.cachix.org"
-    ];
-    extra-trusted-public-keys = [
-      "fenix.cachix.org-1:ecJhr+RdYEdcVgUkjruiYhjbBloIEGov7bos90cZi0Q="
-    ];
-  };
-}