diff --git a/docker/buildworker/Dockerfile b/docker/buildworker/Dockerfile
index 28a30db..b7cf36a 100644
--- a/docker/buildworker/Dockerfile
+++ b/docker/buildworker/Dockerfile
@@ -17,6 +17,7 @@ RUN \
 		build-essential \
 		ccache \
 		curl \
+		file \
 		gawk \
 		g++-multilib \
 		gcc-multilib \