diff --git a/master-galera/master.cfg b/master-galera/master.cfg
index 0d15dc4b..97641b81 100644
--- a/master-galera/master.cfg
+++ b/master-galera/master.cfg
@@ -262,6 +262,20 @@ f_deb_build.addStep(
         submodules=True,
     )
 )
+# Work around while waiting for https://github.com/MariaDB/galera/pull/13
+f_deb_build.addStep(
+    steps.ShellCommand(
+        name="correct build script to use CC/CXX",
+        command=[
+            "sed",
+            "-i",
+            "-e",
+            "/unset/d",
+            "./scripts/build.sh",
+        ],
+        workdir="build",
+    )
+)
 f_deb_build.addStep(
     steps.ShellCommand(
         name="build packages",