diff --git a/ghcup.cabal b/ghcup.cabal
index 1b27e95..a075110 100644
--- a/ghcup.cabal
+++ b/ghcup.cabal
@@ -24,6 +24,9 @@ extra-source-files:
   data/build_mk/cross
   data/build_mk/default
   test/golden/GHCupInfo.json
+  cbits/dirutils.h
+  cbits/dirutils.c
+  
 
 source-repository head
   type:     git
@@ -182,7 +185,10 @@ library
       GHCup.Prelude.File.Posix.Traversals
       GHCup.Prelude.Posix
       GHCup.Prelude.Process.Posix
-
+    
+    include-dirs: cbits
+    includes: dirutils.h
+    install-includes: dirutils.h
     c-sources:     cbits/dirutils.c
     build-depends:
       , bz2              >=0.5.0.5 && <1.1