diff --git a/build_gesso.sh b/build_gesso.sh
index a4994dd8232d1007f72c665e151ce4a9dad84987..74e86643de5865e39e53d6dd253cfc6d9def7c1a 100755
--- a/build_gesso.sh
+++ b/build_gesso.sh
@@ -9,8 +9,8 @@ if [ -f "gulpfile.js" ]; then
   cp gulpfile.js gesso
 fi
 
-if [ -f "packages.json" ]; then
-  cp packages.json gesso
+if [ -f "package.json" ]; then
+  cp package.json gesso
 fi
 
 ln -s "gesso/source" "source"