diff --git a/build.sh b/build.sh
index fa26918..18449cd 100755
--- a/build.sh
+++ b/build.sh
@@ -1,3 +1,5 @@
 #!/bin/sh
+CFLAGS=${CFLAGS:-"-Og -fsanitize=address -ggdb"}
+CC=${CC:-gcc}
 set -x
-clang-19 -DDEBUG -pipe -fsanitize=address -ggdb -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -std=gnu23 $CFLAGS src/*c
+${CC} -DDEBUG -pipe  -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -std=gnu23 $CFLAGS src/*c