View difference between Paste ID: U2aP1z1B and cFNLE6Rh

-pkgs = import <nixpkgs> { overlays = [(self: super:
+
-  {
+
-    haskellPackages = super.haskell.packages.ghc8107.extend (selfHS: superHS: {
+let
-      andromeda = superHS.callCabal2nix "andromeda" (super.fetchFromGitHub {
+  pkgs = import <nixpkgs> { overlays = [(self: super:
-        owner  = "jaredloomis";
+    {
-        repo   = "andromeda";
+      haskellPackages = super.haskell.packages.ghc8107.extend (selfHS: superHS: {
-        rev    = "...";
+        andromeda = superHS.callCabal2nix "andromeda" (super.fetchFromGitHub {
-        sha256 = "...";
+          owner  = "jaredloomis";
-      }) {};
+          repo   = "andromeda";
-    });
+          rev    = "502dfa6703eca9717c7cde0c93959fa0a83e77ed";
-  })];
+          sha256 = "0ymbfpxlh938zryvw2nab0jls9nmf8jjcnyxbbdl47vaq543chir";
-};
+        }) {};
       });
     })];
   };
 in
   (pkgs.haskellPackages.callCabal2nix "androcells" ./. {}).env.overrideAttrs (old: {
     buildInputs = old.buildInputs ++ [
       pkgs.ghostscript
       pkgs.entr
       pkgs.haskellPackages.ghcid
       pkgs.haskellPackages.ghcide
       pkgs.haskellPackages.haskell-language-server
       pkgs.haskellPackages.hlint
     ];
   })