diff --git a/extra/efivar/build b/extra/efivar/build
index 27f04243..d5d52cf9 100755
--- a/extra/efivar/build
+++ b/extra/efivar/build
@@ -17,5 +17,5 @@ mk() {
         "$@"
 }
 
-mk CC="${CC:-cc}"
-mk DESTDIR="$1" install
+mk COMPILER=$CC
+mk install