diff --git a/overlay/bin/rpmbuild b/overlay/bin/rpmbuild
index 1cd25a7..a109704 100755
--- a/overlay/bin/rpmbuild
+++ b/overlay/bin/rpmbuild
@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/usr/bin/sh
 set -eo pipefail
 
 DIR=$(pwd)
diff --git a/overlay/bin/rpmbuild-official b/overlay/bin/rpmbuild-official
index e27b6bd..670fb98 100755
--- a/overlay/bin/rpmbuild-official
+++ b/overlay/bin/rpmbuild-official
@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/usr/bin/sh
 set -eo pipefail
 
 exec /usr/bin/rpmbuild "$@"