diff --git a/ui/build/ninja.go b/ui/build/ninja.go
index 22ec1f1..0749fe3 100644
--- a/ui/build/ninja.go
+++ b/ui/build/ninja.go
@@ -142,6 +142,7 @@
 			"CCACHE_SLOPPINESS",
 			"CCACHE_BASEDIR",
 			"CCACHE_CPP2",
+			"CCACHE_DIR",
 		}, config.BuildBrokenNinjaUsesEnvVars()...)...)
 	}