fixup! Flake-ify dev environment

magthe · Aug 2, 2023 · 7a69149 · 7a69149
1 parent cacd945
commit 7a69149
Showing 1 changed file with 12 additions and 7 deletions.
diff --git a/flake.nix b/flake.nix
@@ -3,6 +3,7 @@
 
   outputs = { self, nixpkgs }:
     with nixpkgs.legacyPackages.x86_64-linux;
+    with builtins;
     let
       hl = haskell.lib;
       hsPkgs = haskell.packages.ghc94;
@@ -14,6 +15,15 @@
         };
       };
 
+      hsDevToolFn = p:
+        with p;
+        if getEnv "NIX_BUILD_SHELL" == "" then [
+          cabal-fmt
+          haskell-language-server
+          hlint
+        ] else
+          [ ];
+
       hsPkgsFn = p:
         with p; [
           cmdargs
@@ -25,13 +35,8 @@
         ];
     in {
       devShell.x86_64-linux = mkShell {
-        buildInputs = with extraHsPkgs; [
-          (ghcWithPackages hsPkgsFn)
-          cabal-fmt
-          cabal-install
-          haskell-language-server
-          hlint
-        ];
+        buildInputs = [ (extraHsPkgs.ghcWithPackages hsPkgsFn) cabal-install ]
+          ++ hsDevToolFn extraHsPkgs;
       };
     };
 }