hackport-0.6.4: cabal/cabal-testsuite/PackageTests/NewHaddock/Fails/cabal.out

# cabal v2-build
Resolving dependencies...
Build profile: -w ghc-<GHCVER> -O1
In order, the following will be built:
 - example-1.0 (lib) (first run)
Configuring library for example-1.0..
Preprocessing library for example-1.0..
Building library for example-1.0..
# cabal v2-haddock
Build profile: -w ghc-<GHCVER> -O1
In order, the following will be built:
 - example-1.0 (lib) (first run)
Preprocessing library for example-1.0..
Running Haddock on library for example-1.0..
cabal: Failed to build documentation for example-1.0-inplace.