use-local-version-of-package.out

# cabal update
Downloading the latest package list from test-local-repo
# cabal new-build
Resolving dependencies...
Build profile:
  with-compiler: ghc-<GHCVER>
  optimization: NormalOptimisation
In order, the following will be built:
 - pkg-1.0 (exe:my-exe) (first run)
Configuring pkg-1.0...
Preprocessing executable 'my-exe' for pkg-1.0..
Building executable 'my-exe' for pkg-1.0..
# pkg my-exe
local pkg-1.0
# cabal new-build
Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: pkg (user goal)
rejecting: pkg-2.0 (constraint from user target requires ==1.0)
rejecting: pkg-1.0 (constraint from command line flag requires ==2.0)
After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: pkg (3)