Added --force to hpack in order to overwrite the cabal file

CMCDragonkai · CMCDragonkai · commit 8e46825d1a7b · 2019-03-30T17:07:28.000+11:00
diff --git a/shell.nix b/shell.nix
@@ -19,7 +19,7 @@
         set -v
 
         cabal2nix --hpack . >./cabal.nix
-        hpack
+        hpack --force
         cabal configure
 
         set +v
