diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 40a2ce3..adbbb1f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -291,7 +291,7 @@
 
       - name: Build
         env:
-          LANG: C
+          LC_ALL: C
         run: |
           make -j${NPROC}