Remove signify, properly configure gitsigns

nix/home/programs/nvim/default.nix

@@ -60,7 +60,6 @@ with builtins;
           let g:rainbow_active = 1
         '';
       }
-      vim-signify
       {
         plugin = vim-indent-guides;
         config = ''
@@ -70,8 +69,15 @@ with builtins;
       }
       vim-surround
       neogit
-      gitsigns-nvim
       vinegar
+      {
+        plugin = gitsigns-nvim;
+        config = ''
+          lua << EOF
+            require('gitsigns').setup()
+          EOF
+        '';
+      }
       undotree
       vim-goyo
       {