The build should stop when that script fails, but it currently continues just leaving in a warning. [5761/6393] Generating ../../inspector-resources.stamp Can't open /home/cgarcia/src/git/gnome/WebKit/Source/WebInspectorUI/UserInterface/Views/SizesToFitNavigationBar.js: No such file or directory at /home/cgarcia/src/git/gnome/WebKit/Source/WebInspectorUI/Scripts/combine-resources.pl line 92.