[DEVOPS-1120] Bring pkgs.nix up to date for latest nix-tools

Author: rvl

nix/pkgs.nix

@@ -14,25 +14,25 @@ let
   hackage = import (overrideWith "hackage"
                     (pkgs.fetchFromGitHub { owner  = "angerman";
                                             repo   = "hackage.nix";
-                                            rev    = "cd21bbd8d8c961793a562d557f9244bd90236961";
-                                            sha256 = "03v2fw63xi3l2a7cvz1n9rl0nq9hk65g1k20w8i0gkky7a6cq9yd";
+                                            rev    = "d8e03ec0e3c99903d970406ae5bceac7d993035d";
+                                            sha256 = "0c7camspw7v5bg23hcas0r10c40fnwwwmz0adsjpsxgdjxayws3v";
                                             name   = "hackage-exprs-source"; }))
                    ;
   # a different haskell infrastructure
   haskell = import (overrideWith "haskell"
                     (pkgs.fetchFromGitHub { owner  = "angerman";
                                             repo   = "haskell.nix";
-                                            rev    = "28a9c6f3528daa57d506d134e137fb617a947985";
-                                            sha256 = "0qv0vb5q96sdfi8pwwrswfhcw3ay0qh91a8l2g6bz46q7zmgp75m";
+                                            rev    = "03026b7bb95a6713f4d50b841abadabb343f83d2";
+                                            sha256 = "05ma2qmmn4p2xcgyy8waissfj953b7wyq97yx80d936074gyyw4s";
                                             name   = "haskell-lib-source"; }))
                    hackage;
 
   # the set of all stackage snapshots
   stackage = import (overrideWith "stackage"
                      (pkgs.fetchFromGitHub { owner  = "angerman";
                                              repo   = "stackage.nix";
-                                             rev    = "014445d63dcf374f30435e5859e463d2c29b5c4e";
-                                             sha256 = "1hma4clx8lslah8l4xpglshbbd42v1vraafhb03ci92dyjscnkdq";
+                                             rev    = "67675ea78ae5c321ed0b8327040addecc743a96c";
+                                             sha256 = "1ds2xfsnkm2byg8js6c9032nvfwmbx7lgcsndjgkhgq56bmw5wap";
                                              name   = "stackage-snapshot-source"; }))
                    ;
 
@@ -49,7 +49,9 @@ let
   pkgSet = haskell.mkNewPkgSet {
     inherit pkgs;
     pkg-def = stackage.${stack-pkgs.resolver};
-    modules = [ stack-pkgs.module ];
+    modules = [
+     # stack-pkgs.module ## seems to not exist
+     ];
   };
 
   packages = pkgSet.config.hsPkgs // { _config = pkgSet.config; };