diff --git a/Makefile.PL b/Makefile.PL
index f39cee4..06b144f 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -48,7 +48,7 @@ THEME = ' . ( $config->{theme} // 'default' ) . "\n";
           . " then mkdir -pv lib/Peertube/DL/public/;" . " fi\n"
           . "\tcp -rfv themes/\${THEME}/public/dist/* lib/Peertube/DL/public/\n"
           . "build_frontend :\n"
-          . "\tcd themes/\${THEME}/public && yarn build\n"
+          . "\tcd themes/\${THEME}/public && yarn install && yarn build\n"
           . "install_config :\n"
           . "\tinstall peertube-dl-web.conf bin/peertube-dl-web.conf\n"
           . "src: src/Makefile\n"