diff --git a/pkgs/development/perl-modules/XML-Parser/default.nix b/pkgs/development/perl-modules/XML-Parser/default.nix
index 8ea0606f0eb0..ce86a007279d 100644
--- a/pkgs/development/perl-modules/XML-Parser/default.nix
+++ b/pkgs/development/perl-modules/XML-Parser/default.nix
@@ -6,6 +6,6 @@ import ../generic perl {
     url = http://nix.cs.uu.nl/dist/tarballs/XML-Parser-2.34.tar.gz;
     md5 = "84d9e0001fe01c14867256c3fe115899";
   };
-  perlPreHook = ./hook.sh;
+  perlPreHook = "makeMakerFlags=\"EXPATLIBPATH=$expat/lib EXPATINCPATH=$expat/include\"";
   inherit expat;
 }
diff --git a/pkgs/development/perl-modules/XML-Parser/hook.sh b/pkgs/development/perl-modules/XML-Parser/hook.sh
deleted file mode 100644
index 44df351a2220..000000000000
--- a/pkgs/development/perl-modules/XML-Parser/hook.sh
+++ /dev/null
@@ -1 +0,0 @@
-makeMakerFlags="EXPATLIBPATH=$expat/lib EXPATINCPATH=$expat/include"