--- libs/libvpx/configure.orig	2021-10-24 18:22:28 UTC
+++ libs/libvpx/configure
@@ -146,7 +146,7 @@ for t in ${all_targets}; do
     [ -f "${source_path}/${t}.mk" ] && enable_feature ${t}
 done
 
-if ! diff --version >/dev/null; then
+if ! command -v diff >/dev/null; then
   die "diff missing: Try installing diffutils via your package manager."
 fi