diff --git a/.gitignore b/.gitignore
index dbc7bd0cd56f1358748a30a00894631cbdf91ce0..de838fcb433ef6c06efdc2d06269264f6c254f9e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,18 +16,21 @@
 # Analysis output
 hel_scalers_*.json
 
+# ROOT history file
+.root_history
+
 # Directories
 RAID
 REPORT_OUTPUT
 HISTOGRAMS
 MON_OUTPUT
 ROOTfiles
-.root_history
 raw
 raw.copiedtotape
 cache
 logs
 scratch
+.root_build_dir
 
 # Symbolic links
 hcana