diff --git a/.gitignore b/.gitignore
index 7021453..e9570b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,10 @@ dist/
 # cabal
 .cabal-sandbox/
 cabal.sandbox.config
+
+# profiling
+*.prof
+
+_darcs/
+
+.liquid/