diff --git a/Dockerfile b/Dockerfile
index d6890fb..ec119fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM ubuntu:24.04
-ENV LANG C.UTF-8
+ENV LANG=C.UTF-8
 
 ARG JOBS
 ARG MACOS_SDK_VERSION