Alex-generated Lexer isn't found when building test-suite

[owst]

I'd like to use my Alex-generated lexer in my test-suite. I've tried adding other-modules/build-tools to my test-suite section, but upon building the Lexer module isn't found.

I've got no problems using the lexer within my normal executable. Should I be able to use my Lexer in the test-suite?

I'll attach a fairly minimal example, the Main module and the TestSuite? module both use the Lexer, Main will compile, TestSuite? won't:

$ cabal configure --enable-tests $ cabal build [... blurb] Preprocessing test suite 'tests' for test-suite-with-alex-0.0...

tests/TestSuite.hs:7:8:

Could not find module `MyLexer?' Perhaps you meant Lexer (needs flag -package ghc-7.4.1) Use -v to see a list of the files searched for.