Try this

Author: michaelpj

cabal.project

@@ -50,8 +50,6 @@ constraints:
   -- C++ is hard to distribute, especially on older GHCs
   -- See https://github.com/haskell/haskell-language-server/issues/3822
   text -simdutf,
-  -- strange solver errors without this, seems like it should not be required
-  filepath installed,
   ghc-check -ghc-check-use-package-abis,
   ghc-lib-parser-ex -auto,
   -- Centos 7 comes with an old gcc version that doesn't know about
@@ -73,7 +71,7 @@ source-repository-package
   tag: 7a0af7a8fd38045fd15fb13445bdcc7085325460
 -- END DELETE
 
-if impl(ghc >= 9.3)
+if impl(ghc >= 9.1)
   -- ekg packagess are old and unmaintained, but we 
   -- don't rely on them for the mainline build, so 
   -- this is okay