diff --git a/script/build-libgit2-static.sh b/script/build-libgit2-static.sh
index 680dd93..096c5c6 100755
--- a/script/build-libgit2-static.sh
+++ b/script/build-libgit2-static.sh
@@ -12,6 +12,7 @@ cd "${BUILD_PATH}/build" &&
 cmake -DTHREADSAFE=ON \
       -DBUILD_CLAR=OFF \
       -DBUILD_SHARED_LIBS=OFF \
+      -DREGEX_BACKEND=builtin \
       -DCMAKE_C_FLAGS=-fPIC \
       -DCMAKE_BUILD_TYPE="RelWithDebInfo" \
       -DCMAKE_INSTALL_PREFIX="${BUILD_PATH}/install" \