diff --git a/.dockerignore b/.dockerignore
index db7c918e2e..7e6efdf937 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -42,6 +42,7 @@ CONTRIBUTING.md
 #LICENSE-2.0.txt
 
 # Native CMake/Make build
+.cache/
 dependencies/sources
 dependencies/install
 ortools/gen