diff --git a/build.sh b/build.sh
index e356e99..58bd62b 100755
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,7 @@
 #!/bin/sh -e
 # shellcheck disable=2086
 
-[ -z "$CFLAGS" ] && CFLAGS='-O2 -Wall -Wextra -pedantic'
+[ -z "$CFLAGS" ] && CFLAGS='-Os -Wall -Wextra -pedantic'
 
 CLANG=clang
 STRIP=llvm-strip
@@ -45,3 +45,5 @@ zig/zig cc $CFLAGS -Ijni-headers oc2rnet.c -static -shared -target x86_64-linux-
 zig/zig cc $CFLAGS -Ijni-headers oc2rnet.c -static -shared -target aarch64-linux-musl -o liboc2rnet-arm64.so
 zig/zig cc $CFLAGS -Ijni-headers oc2rnet.c -shared -target x86_64-windows-gnu -o oc2rnet-x86_64.dll -licmp
 zig/zig cc $CFLAGS -Ijni-headers oc2rnet.c -shared -target aarch64-windows-gnu -o oc2rnet-arm64.dll -licmp
+
+$STRIP *.so