diff --git a/conftrack.cabal b/conftrack.cabal
index efc198f..ac17b62 100644
--- a/conftrack.cabal
+++ b/conftrack.cabal
@@ -56,6 +56,7 @@ library
                     , file-io >= 0.1.1 && < 0.2
                     , template-haskell >= 2.20.0 && < 2.21
                     , directory >= 1.3.8 && < 1.4
+		    , os-string
     hs-source-dirs:   src
     default-language: GHC2021