New working flake.nix.

flake.lock

@@ -20,16 +20,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1683594133,
-        "narHash": "sha256-iUhLhEAgOCnexSGDsYT2ouydis09uDoNzM7UC685XGE=",
+        "lastModified": 1746380391,
+        "narHash": "sha256-0y702Qk+CDWnmpxGbkrRuF4+n1efCxRmKlBT/uMqQsc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8d447c5626cfefb9b129d5b30103344377fe09bc",
+        "rev": "3e0905a3fb9e1e6f8b0de9137386e40439d21471",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -1,53 +1,41 @@
 {
-  description = "Pandoc development";
+  description = "pandoc";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
 
-  outputs = inputs:
-    let
-      overlay = final: prev: {
-        haskell = prev.haskell // {
-          packageOverrides = hfinal: hprev:
-            prev.haskell.packageOverrides hfinal hprev // {
-              crypton-connection = final.fetchFromGitHub {
-                owner = "kazu-yamamoto";
-                repo = "crypton-connection";
-                rev = "5c064b911e7327a4d399fd9dd057663d0d0fb256";
-                sha256 = "00j1nf9glbz0cnzd84vp08j9ybzjbm3b6gcamlqxxcjb31kllz4b";
-              };
-              pandoc = hfinal.callCabal2nix "pandoc" ./. { };
-            };
-        };
-        pandoc = final.haskell.lib.compose.justStaticExecutables final.haskellPackages.pandoc;
-      };
-      perSystem = system:
-        let
-          pkgs = import inputs.nixpkgs { inherit system; overlays = [ overlay ]; };
-          hspkgs = pkgs.haskellPackages;
-        in
-        {
-          devShell = hspkgs.shellFor {
-            withHoogle = true;
-            packages = p : [
-              p.pandoc
-            ];
-            buildInputs = [
-              hspkgs.cabal-install
-              hspkgs.haskell-language-server
-              hspkgs.hlint
-              hspkgs.ghcid
-              hspkgs.ormolu
-              hspkgs.stylish-haskell
-              hspkgs.weeder
-              hspkgs.servant-server
-              hspkgs.hslua
-              pkgs.bashInteractive
-            ];
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        haskellPackages = pkgs.haskellPackages;
+
+        jailbreakUnbreak = pkg:
+          pkgs.haskell.lib.doJailbreak (pkg.overrideAttrs (_: { meta = { }; }));
+
+        # DON'T FORGET TO PUT YOUR PACKAGE NAME HERE, REMOVING `throw`
+        packageName = "pandoc";
+      in {
+        packages.${packageName} =
+          haskellPackages.callCabal2nix packageName self rec {
+            # Dependency overrides go here
           };
-          defaultPackage = pkgs.pandoc;
+
+        packages.default = self.packages.${system}.${packageName};
+        defaultPackage = self.packages.${system}.default;
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            haskellPackages.haskell-language-server # you must build it with your ghc to work
+            zlib
+            ghcid
+            cabal-install
+          ];
+          inputsFrom = map (__getAttr "env") (__attrValues self.packages.${system});
         };
-    in
-    { inherit overlay; } //
-      inputs.flake-utils.lib.eachDefaultSystem perSystem;
+        devShell = self.devShells.${system}.default;
+      });
 }