haskell-generic-builder: disable library-for-ghci by default

This commit disables the library-for-ghci flag passed to
`Setup configure` in the Haskell generic-builder.nix file.

This stops the HSfoo.o file from being built.  Building this
HSfoo.o file caused doctest to take an extremely long time
to load dependencies when running.

This is a follow-up from NixOS#58743.

pkgs/development/haskell-modules/generic-builder.nix

@@ -81,10 +81,10 @@ in
   # built. Will delay failures, if any, to compile time.
   allowInconsistentDependencies ? false
 , maxBuildCores ? 4 # GHC usually suffers beyond -j4. https://ghc.haskell.org/trac/ghc/ticket/9221
-, # Build a pre-linked .o file for this Haskell library.  This can make it
-  # slightly faster to load this library into GHCi, but takes extra disk space
-  # and compile time.
-  enableLibraryForGhci ? true
+, # If set to true, this builds a pre-linked .o file for this Haskell library.
+  # This can make it slightly faster to load this library into GHCi, but takes
+  # extra disk space and compile time.
+  enableLibraryForGhci ? false
 } @ args:
 
 assert editedCabalFile != null -> revision != null;