diff --git a/.travis.yml b/.travis.yml
index 97b07520..842ec274 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ cache:
   - $HOME/.stack
   - $HOME/.agda
   - $HOME/.local
+  - $HOME/.luarocks
   - $HOME/agda-$AGDA_VERSION
   - $HOME/agda-stdlib-$AGDA_STDLIB_VERSION
   - $HOME/acknowledgements-master
diff --git a/Makefile b/Makefile
index 55ba1160..18ed74a5 100644
--- a/Makefile
+++ b/Makefile
@@ -29,10 +29,6 @@ test-stable-offline: $(MARKDOWN)
 	ruby -S bundle exec htmlproofer '_site' --disable-external
 
 
-statistics:
-	hs/agda-count
-
-
 out/:
 	mkdir -p out/
 
@@ -211,15 +207,15 @@ $(HOME)/.local/bin/agda:
 		stack install --stack-yaml=stack-8.0.2.yaml
 
 $(HOME)/.local/share/lua/5.1/tinyyaml.lua:
-	luarocks install lua-tinyyaml
+	luarocks install --local lua-tinyyaml
 
 $(HOME)/.local/share/lua/5.1/liquid.lua:
-	luarocks install liquid
+	luarocks install --local liquid
 
 $(HOME)/.local/share/lua/5.1/cjson:
 	# Only this particular version works:
 	# https://github.com/mpx/lua-cjson/issues/56:
-	luarocks install lua-cjson 2.1.0-1
+	luarocks install --local lua-cjson 2.1.0-1
 
 travis-uninstall-agda:
 	rm -rf $(HOME)/agda-$(AGDA_VERSION)/