--- a/Build.PL
+++ b/Build.PL
@@ -1,7 +1,8 @@
 use Module::Build;
 use strict;
 
-my $CONFIG = "pkg-config imlib2";
+my $PKG_CONFIG = $ENV{PKG_CONFIG} || 'pkg-config';
+my $CONFIG = "${PKG_CONFIG} imlib2";
 
 my $version = `$CONFIG --version`;
 if (!$version) {
@@ -18,7 +19,7 @@ Alternatively, if you have downloaded and installed imlib2 and this
 still will not work, modify the $CONFIG variable inside Build.PL to
 point to the imlib2-config program that provides.
 ';
-  exit 0;
+  exit 1;
 } else {
   print "Found imlib2 $version";
 }