--- a/build.sh
+++ b/build.sh
@@ -52,7 +52,7 @@ fi
 
 mkdir -p bin
 CC="${CC:-cc}"
-CFLAGS="${CFLAGS:--std=c89 -Wall -Wno-unknown-pragmas}"
+CFLAGS="${CFLAGS} --std=c89 "
 case "$(uname -s 2>/dev/null)" in
 MSYS_NT*|MINGW*) # MSYS2 on Windows
 	FILE_LDFLAGS="-liberty"
@@ -77,7 +77,7 @@ then
 	echo "[debug]"
 	CFLAGS="${CFLAGS} -DDEBUG -Wpedantic -Wshadow -Wextra -Werror=implicit-int -Werror=incompatible-pointer-types -Werror=int-conversion -Wvla -g -Og -fsanitize=address -fsanitize=undefined"
 else
-	CFLAGS="${CFLAGS} -DNDEBUG -O2 -g0 -s"
+	CFLAGS="${CFLAGS} -DNDEBUG "
 fi
 
 ${CC} ${CFLAGS} src/uxnasm.c -o bin/uxnasm