--- This conditional lets us switch off the "import FastString"
--- when compiling FastString itself, or when compiling modules that
--- don't use it (and would otherwise get warnings, which we treat
--- as errors). Can we do this more nicely?
-#if !defined(COMPILING_FAST_STRING) && !defined(FAST_STRING_NOT_NEEDED)
---
-import qualified FastString as FS
-#endif
-