diff --git a/src/Makevars.in b/src/Makevars.in
index 94f4b30..c2bd2a1 100644
--- a/src/Makevars.in
+++ b/src/Makevars.in
@@ -19,7 +19,7 @@ $(STATLIB):
 	fi
 
 	@BEFORE_CARGO_BUILD@ cd ./rust && cargo build --lib --release --offline --jobs=1
-	@AFTER_CARGO_BUILD@
+	@AFTER_CARGO_BUILD@ rm -Rf ./rust/vendor ./rust/.cargo
 
 C_clean:
 	rm -Rf $(SHLIB) $(OBJECTS) ./rust/.cargo $(STATLIB)
diff --git a/src/Makevars.win.in b/src/Makevars.win.in
index 776c69d..e61df06 100644
--- a/src/Makevars.win.in
+++ b/src/Makevars.win.in
@@ -27,7 +27,7 @@ $(STATLIB):
 	fi
 
 	@BEFORE_CARGO_BUILD@ cd ./rust && cargo build --target=$(TARGET) --lib --release --offline --jobs=1
-	@AFTER_CARGO_BUILD@
+	@AFTER_CARGO_BUILD@ rm -Rf ./rust/vendor ./rust/.cargo
 
 C_clean:
 	rm -Rf $(SHLIB) $(OBJECTS) ./rust/.cargo $(STATLIB)