diff --git a/cmd/skopeo/cgo_pthread_ordering_workaround.go b/cmd/skopeo/cgo_pthread_ordering_workaround.go
index 9d236223..b19ee1b5 100644
--- a/cmd/skopeo/cgo_pthread_ordering_workaround.go
+++ b/cmd/skopeo/cgo_pthread_ordering_workaround.go
@@ -1,3 +1,5 @@
+// +build !containers_image_openpgp
+
 package main
 
 /*