diff --git a/.gitignore b/.gitignore
index ab21150e..ac8e84d0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,4 +26,4 @@ project/metals.sbt
 project/project/
 .ivy2
 .sbt
-classpath-cache/
+.classpath_cache/
diff --git a/variables.mk b/variables.mk
index 86d26a72..a1630f13 100644
--- a/variables.mk
+++ b/variables.mk
@@ -146,7 +146,7 @@ ifeq ($(GENERATOR_PACKAGE),hwacha)
 endif
 
 # classpaths
-CLASSPATH_CACHE ?= $(base_dir)/classpath-cache
+CLASSPATH_CACHE ?= $(base_dir)/.classpath_cache
 CHIPYARD_CLASSPATH ?= $(CLASSPATH_CACHE)/chipyard.jar
 TAPEOUT_CLASSPATH ?= $(CLASSPATH_CACHE)/tapeout.jar
 # if *_CLASSPATH is a true java classpath, it can be colon-delimited list of paths (on *nix)