diff --git a/cabal.project b/cabal.project
index 0afdc91..792e081 100644
--- a/cabal.project
+++ b/cabal.project
@@ -2,6 +2,12 @@ packages:
     */*.cabal,
     experimental/*/*.cabal
 
+-- FIXME: remove once package is released.
+-- Only targeting GHC versions that build ucd2haskell in CI
+if ((impl(ghc >= 9.2.0) && impl(ghc < 9.3.0)) || (impl(ghc >= 9.10.0) && impl(ghc < 9.11.0)))
+    optional-packages:
+        https://hackage.haskell.org/package/shamochu-0.1.0.0/candidate/shamochu-0.1.0.0.tar.gz
+
 -- Test all non-dev flags
 package unicode-data-names
   flags: +export-all-chars