1 files changed, 20 insertions, 19 deletions

diff --git a/ymir/mlmmj-expose.nix b/ymir/mlmmj-expose.nix
index b3f7499c..40645b93 100644
--- a/ymir/mlmmj-expose.nix
+++ b/ymir/mlmmj-expose.nix
@@ -1,7 +1,6 @@
 { config, pkgs, ... }:
 
 let
-  haskellEnv = pkgs.haskellPackages.ghcWithPackages dependencies;
   dependencies = pkgs: with pkgs; [ filepath
                                     directory
                                     cryptonite
@@ -10,24 +9,26 @@ let
                                     aeson
                                     aeson-pretty
                                   ];
-  mlmmj-exposed = pkgs.stdenv.mkDerivation {
-    name = "mlmmj-expose";
-    src = pkgs.substituteAll {
-      src = ./mlmmj-expose.hs;
-      inherit (pkgs) mlmmj;
-    };
-    buildCommand = ''
-      mkdir -p $out/bin
-      #cp $src $out/bin/.mlmmj-exposed
-      ${haskellEnv}/bin/ghc -o $out/bin/.mlmmj-expose -odir . -hidir . $src
-      for f in mlmmj-exposed mlmmj-expose mlmmj-get-exposed mlmmj-serve-exposed; do
-        ln -s .mlmmj-expose $out/bin/$f
-      done
-    '';
-  };
+
 in rec {
-  nixpkgs.config.packageOverrides = pkgs: rec {
-    inherit mlmmj-exposed;
-  };
+  nixpkgs.config.overlays = [(self: super: {
+    mlmmj-exposed = super.stdenv.mkDerivation {
+      name = "mlmmj-expose";
+      src = super.substituteAll {
+        src = ./mlmmj-expose.hs;
+        inherit (pkgs) mlmmj;
+      };
+      buildCommand = let
+        haskellEnv = self.haskellPackages.ghcWithPackages dependencies;
+      in ''
+        mkdir -p $out/bin
+        #cp $src $out/bin/.mlmmj-exposed
+        ${haskellEnv}/bin/ghc -o $out/bin/.mlmmj-expose -odir . -hidir . $src
+        for f in mlmmj-exposed mlmmj-expose mlmmj-get-exposed mlmmj-serve-exposed; do
+          ln -s .mlmmj-expose $out/bin/$f
+        done
+      '';
+    };
+  })];
   environment.systemPackages = [ mlmmj-exposed ];
 }