--- old/./.hgignore	2018-01-18 14:22:34.329316570 +0100
+++ new/./.hgignore	2018-01-18 14:22:34.141315638 +0100
@@ -1,4 +1,5 @@
 ^build/
+^.build/
 ^dist/
 ^.idea/
 nbproject/private/