diff --git a/pkgs/development/libraries/haskell/ghc-mod/5.0.1.nix b/pkgs/development/libraries/haskell/ghc-mod/5.0.1.nix
index eea28837a81..ad920721451 100644
--- a/pkgs/development/libraries/haskell/ghc-mod/5.0.1.nix
+++ b/pkgs/development/libraries/haskell/ghc-mod/5.0.1.nix
@@ -35,17 +35,13 @@ cabal.mkDerivation (self: {
     mv $out/bin/ghc-mod $out/bin/.ghc-mod-wrapped
     cat - > $out/bin/ghc-mod <<EOF
     #! ${self.stdenv.shell}
-    COMMAND=\$1
-    shift
-    eval exec $out/bin/.ghc-mod-wrapped \$COMMAND \$( ${self.ghc.GHCGetPackages} ${self.ghc.version} | tr " " "\n" | tail -n +2 | paste -d " " - - | sed 's/.*/-g "&"/' | tr "\n" " ") "\$@"
+    eval exec $out/bin/.ghc-mod-wrapped \$( ${self.ghc.GHCGetPackages} ${self.ghc.version} | tr " " "\n" | tail -n +2 | paste -d " " - - | sed 's/.*/-g "&"/' | tr "\n" " ") "\$@"
     EOF
 
     mv $out/bin/ghc-modi $out/bin/.ghc-modi-wrapped
     cat - > $out/bin/ghc-modi <<EOF
     #! ${self.stdenv.shell}
-    COMMAND=\$1
-    shift
-    eval exec $out/bin/.ghc-modi-wrapped \$COMMAND \$( ${self.ghc.GHCGetPackages} ${self.ghc.version} | tr " " "\n" | tail -n +2 | paste -d " " - - | sed 's/.*/-g "&"/' | tr "\n" " ") "\$@"
+    eval exec $out/bin/.ghc-modi-wrapped \$( ${self.ghc.GHCGetPackages} ${self.ghc.version} | tr " " "\n" | tail -n +2 | paste -d " " - - | sed 's/.*/-g "&"/' | tr "\n" " ") "\$@"
     EOF
 
     chmod +x $out/bin/ghc-mod