diff --git a/mozilla/build/cygwin-wrapper b/mozilla/build/cygwin-wrapper
index e716c0dce12..3da3c508d74 100755
--- a/mozilla/build/cygwin-wrapper
+++ b/mozilla/build/cygwin-wrapper
@@ -7,7 +7,7 @@ shift
 if test -z "$prog"; then
     exit 0
 fi
-mountpoint=`mount -p | awk '{ if (/^\//) print $1 }' | head -1`
+mountpoint=`mount -p | awk '{ if (/^\//) { print $1; exit } }'`
 if test -z "$mountpoint"; then
    print "Cannot determine cygwin mount points. Exiting"
    exit 1
diff --git a/mozilla/config/make-jars.pl b/mozilla/config/make-jars.pl
index 6a164215ef3..8b536941b4f 100644
--- a/mozilla/config/make-jars.pl
+++ b/mozilla/config/make-jars.pl
@@ -4,7 +4,7 @@
 
 my $cygwin_mountprefix = "";
 if ($^O eq "cygwin") {
-$cygwin_mountprefix = `mount -p | awk '{ if (/^\//) print $1}' | head -1`;
+$cygwin_mountprefix = `mount -p | awk '{ if (/^\//) { print $1; exit } }'`;
 } else {
 # we'll be pulling in some stuff from the script directory
 require FindBin;