diff --git a/edksetup.sh b/edksetup.sh
index 06d2f041e6..46b295c430 100755
--- a/edksetup.sh
+++ b/edksetup.sh
@@ -105,6 +105,19 @@ function SetupEnv()
   fi
 }

+# whereis(1) is not a POSIX utility and, for example, its implementation
+# in NetBSD is different form the Linux one.
+#
+function whereis()
+{
+  (
+    IFS=:
+    for dir in $PATH; do
+      eval ls $dir/${1}* 2>/dev/null || true
+    done
+  )
+}