diff --git a/build-lin.sh b/build-lin.sh
index 7716b30..0dfc92d 100755
--- a/build-lin.sh
+++ b/build-lin.sh
@@ -32,5 +32,8 @@ popd
 mkdir -p build
 cd build

+# We must set these cxxflags so harfbuzz header is found:
+# https://gitlab.kitware.com/cmake/cmake/issues/19531
+CXXFLAGS=$(pkgconf --cflags harfbuzz) \
 cmake $@ .. || exit 1
 make -j || exit 1