diff --git a/.gitignore b/.gitignore
index 3d7e99c65e6..84a1b82bbaf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -140,3 +140,7 @@ client_secrets.json
 dependency-reduced-pom.xml
 mage-bundle
 /Mage.Client/game-*.json
+
+# build-tools config and log files when building client/server with Atom
+.build-tools.cson
+build-output.log