chore: fix build environment on NixOS

shell.nix

@@ -1,8 +1,7 @@
-{ nixpkgs ? import <nixpkgs>, compiler ? null }:
+{ nixpkgs ? import <nixpkgs> }:
 
 let
-  inherit (nixpkgs {}) pkgs;
+  haskellPackages = import ./stackage.nix { inherit nixpkgs; };
-  haskellPackages = if isNull compiler then pkgs.haskellPackages else pkgs.haskell.packages."${compiler}";
 
   drv = haskellPackages.callPackage ./uniworx.nix {};
 
@@ -19,7 +18,7 @@ let
   '';
 
   override = oldAttrs: {
-    nativeBuildInputs = oldAttrs.nativeBuildInputs ++ (with pkgs; [ postgresql pgadmin openldap ]) ++ (with haskellPackages; [ stack yesod-bin hlint cabal-install ]);
+    nativeBuildInputs = oldAttrs.nativeBuildInputs ++ (with pkgs; [ nodejs-8_x postgresql pgadmin openldap ]) ++ (with haskellPackages; [ stack yesod-bin hlint cabal-install ]);
     shellHook = ''
       export PROMPT_INFO="${oldAttrs.name}"
 

stack.nix

@@ -1,16 +1,11 @@
 { ghc, nixpkgs ? import <nixpkgs> }:
 
 let
-  snapshot = "lts-10.5";
+  haskellPackages = import ./stackage.nix { inherit nixpkgs; };
-  stackage = import (fetchTarball {
+  inherit (nixpkgs {}) pkgs;
-    url = "https://stackage.serokell.io/drczwlyf6mi0ilh3kgv01wxwjfgvq14b-stackage/default.nix.tar.gz";
+in pkgs.haskell.lib.buildStackProject {
-    sha256 = "1bwlbxx6np0jfl6z9gkmmcq22crm0pa07a8zrwhz5gkal64y6jpz";
-  });
-  inherit (nixpkgs { overlays = [ stackage."${snapshot}" ]; }) haskell pkgs;
-
-  haskellPackages = pkgs.haskell.packages."${snapshot}";
-in haskell.lib.buildStackProject {
   inherit ghc;
+  inherit (haskellPackages) stack;
   name = "stackenv";
   buildInputs = (with pkgs;
     [ postgresql zlib libsodium

stack.yaml

@@ -9,20 +9,15 @@ extra-package-dbs: []
 
 packages:
   - .
-  - location:
-      git: https://github.com/pngwjpgh/zip-stream.git
-      commit: 9272bbed000928d500febad1cdc98d1da29d399e
-    extra-dep: true
-  - location:
-      git: https://github.com/pngwjpgh/encoding.git
-      commit: 67bb87ceff53f0178c988dd4e15eeb2daee92b84
-    extra-dep: true
-  - location:
-      git: https://github.com/pngwjpgh/memcached-binary.git
-      commit: b5461747e7be226d3b67daebc3c9aefe8a4490ad
-    extra-dep: true
 
 extra-deps:
+  - git: https://github.com/pngwjpgh/zip-stream.git
+    commit: 9272bbed000928d500febad1cdc98d1da29d399e
+  - git: https://github.com/pngwjpgh/encoding.git
+    commit: 67bb87ceff53f0178c988dd4e15eeb2daee92b84
+  - git: https://github.com/pngwjpgh/memcached-binary.git
+    commit: b5461747e7be226d3b67daebc3c9aefe8a4490ad
+  
   - colonnade-1.2.0
   - yesod-colonnade-1.2.0
 

stackage.nix

@@ -0,0 +1,30 @@
+{ nixpkgs ? import <nixpkgs>
+, snapshot ? "lts-10.5"
+}:
+
+let
+  stackage = import (fetchTarball {
+    url = "https://stackage.serokell.io/drczwlyf6mi0ilh3kgv01wxwjfgvq14b-stackage/default.nix.tar.gz";
+    sha256 = "1bwlbxx6np0jfl6z9gkmmcq22crm0pa07a8zrwhz5gkal64y6jpz";
+  });
+
+  overlays =
+    [ stackage."${snapshot}"
+      (self: super: {
+          haskell = super.haskell // {
+            packages = super.haskell.packages // {
+              "${snapshot}" = super.haskell.packages."${snapshot}".override {
+                overrides = hself: hsuper: {
+                  zip-archive = self.haskell.lib.overrideCabal hsuper.zip-archive (old: {
+                    testToolDepends = old.testToolDepends ++ (with self; [ unzip ]);
+                  });
+                };
+              };
+            };
+          };
+        }
+      )
+    ];
+
+  inherit (nixpkgs { inherit overlays; }) pkgs;
+in pkgs.haskell.packages."${snapshot}"