emacs.pkgs.agda2-mode: fix

pkgs/applications/editors/emacs/elisp-packages/agda2-mode/default.nix

@@ -4,18 +4,18 @@
 
 trivialBuild rec {
   pname = "agda-mode";
-  version = pkgs.haskellPackages.Agda.version;
+  version = haskellPackages.Agda.version;
 
   dontUnpack = true;
 
   # already byte-compiled by Agda builder
   buildPhase = ''
-    agda=`${pkgs.haskellPackages.Agda}/bin/agda-mode locate`
+    agda=`${haskellPackages.Agda}/bin/agda-mode locate`
     cp `dirname $agda`/*.el* .
   '';
 
   meta = {
-    inherit (pkgs.haskellPackages.Agda.meta) homepage license;
+    inherit (haskellPackages.Agda.meta) homepage license;
     description = "Agda2-mode for Emacs extracted from Agda package";
     longDescription = ''
       Wrapper packages that liberates init.el from `agda-mode locate` magic.