It will eventually fail when building the snap executable because of the executable's use of TH. The fix is quite easy: add extensions: TemplateHaskell to the Executable snap block in snap.cabal.
Building a dynamic/profiling library or executable that uses TH requires that it gets built twice: once the vanilla way, and then the dynamic/profiling way. Cabal handles this edge case as long as it knows that TH is in use.
If you try building
snaplike so:It will eventually fail when building the
snapexecutable because of the executable's use of TH. The fix is quite easy: addextensions: TemplateHaskellto theExecutable snapblock insnap.cabal.Building a dynamic/profiling library or executable that uses TH requires that it gets built twice: once the vanilla way, and then the dynamic/profiling way. Cabal handles this edge case as long as it knows that TH is in use.