The case is that I have a package with an executable and a library. The executable works fine with "ghc-options: -F -pgmF ./xxx.sh" in its cabal config section, but the library seems to ignore it when I put the same line into the library's section and then run "cabal repl". Also, the substitutions didn't happen when running GHC directly with -F and -pgmF in expression mode (-e).