diff --git a/cabal.project b/cabal.project
index 14254cc..a405bef 100644
--- a/cabal.project
+++ b/cabal.project
@@ -13,3 +13,4 @@ package ghcup
 package tar-bytestring
     ghc-options: -O2
 
+index-state: 2020-03-09T18:53:34Z