diff --git a/.Rbuildignore b/.Rbuildignore
index 37c79a7805319f2cc714e49b074db50ed907a968..5493f6df42b306fd00555b902681e895fd4c2925 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -2,7 +2,8 @@
 .*\.gitignore$
 .*\.tar.gz$
 .*\.pdf$
-.*^(?!inst/).*\.nc$
+.*^(?!inst)\.nc$
+sample_data
 README\.Rmd$
 README\.md$
 \..*\.RData$