diff --git a/Tools/scripts/mkptools/mkpbuild b/Tools/scripts/mkptools/mkpbuild
index 996d527547f6..52537912ff8d 100755
--- a/Tools/scripts/mkptools/mkpbuild
+++ b/Tools/scripts/mkptools/mkpbuild
@@ -53,10 +53,12 @@ $tmpdir = "$tmpbase/$user.$portname";
 $wdpdir = "$tmpdir/wdp";
 $predir = "$tmpdir/prefix";
 
-$hmake = "env WRKDIRPREFIX=$wdpdir " .
-		"{SHARE,MAN,LIB,BIN}{OWN,GRP}=$user " .
-		"PREFIX=$predir NO_PKG_REGISTER=1 make";
-
+$hmake = "env WRKDIRPREFIX=$wdpdir PREFIX=$predir NO_PKG_REGISTER=1 ";
+foreach (qw"SHARE MAN LIB BIN") {
+	$hmake .= $_ . "OWN=$user ";
+	$hmake .= $_ . "GRP=$user ";
+}
+$hmake .= "PREFIX=$predir NO_PKG_REGISTER=1 make";
 
 open(BUILD, "$hmake |");
 while(<BUILD>) {