diff --git a/libcontainer/internal/userns/userns_maps.c b/libcontainer/internal/userns/userns_maps_linux.c
similarity index 99%
rename from libcontainer/internal/userns/userns_maps.c
rename to libcontainer/internal/userns/userns_maps_linux.c
index 84f2c6188c3..fdb20aecad8 100644
--- a/libcontainer/internal/userns/userns_maps.c
+++ b/libcontainer/internal/userns/userns_maps_linux.c
@@ -1,3 +1,5 @@
+//go:build linux
+
 #define _GNU_SOURCE
 #include <fcntl.h>
 #include <sched.h>