diff --git a/scripts/build_nim.sh b/scripts/build_nim.sh
index d901fb3..868cfec 100755
--- a/scripts/build_nim.sh
+++ b/scripts/build_nim.sh
@@ -149,6 +149,7 @@ build_nim() {
 		sed \
 			-e 's/koch$/--warnings:off --hints:off koch/' \
 			-e 's/koch boot/koch boot --warnings:off --hints:off/' \
+			-e '/nimBuildCsourcesIfNeeded/d' \
 			build_all.sh > build_all_custom.sh
 		sh build_all_custom.sh
 		rm build_all_custom.sh