I'll install yesod-examples.
But cabal install yesod-examples failed.
Error Messages are here.

----
Linking dist/build/form/form ...

yesod/tutorial/mkToForm.hs:11:7:
    Could not find module `MkToForm':
      Use -v to see a list of the files searched for.
cabal: Error: some packages failed to install:
yesod-examples-0.6.0 failed during the building phase. The exception was:
ExitFailure 1
---

The mkToForm.hs's line 11 is 'import MkToForm'.
You success to compile this?