What's wrong with this equivs control file?

[Adam Funk]

I've compiled gnupg from source and am trying unsuccessfully to use
equivs to remove the standard package from my system but keep
satisfying the dependencies.  I have the following gnupg-equiv.ctl
file:

Section: misc
Priority: optional
Standards-Version: 3.6.2

Package: gnupg-equiv
Version: 1.9.0
Provides: gnupg (= 1.9.0)
Replaces: gnupg
#Conflicts: gnupg
Description: gnupg with IDEA
 GPG compiled from source with IDEA.


(I've tried this with and without the "Conflicts" line included.)
Then I use equivs-build and dpkg -i to try to install it, but I keep
getting errors that dpkg cannot remove the existing gnupg package
because of dependencies.  What am I missing?