Resolving dependencies...
Configuring ports-tools-0.0.1...
Building ports-tools-0.0.1...
Installed ports-tools-0.0.1
Configuring up-grade-0.0.1...
Building up-grade-0.0.1...
Failed to install up-grade-0.0.1
Build log ( /home/builder/.cabal/logs/up-grade-0.0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-6999/up-grade-0.0.1'
Configuring up-grade-0.0.1...
Building up-grade-0.0.1...
Preprocessing executable 'up' for up-grade-0.0.1...
[1 of 1] Compiling Main             ( src/Main.hs, dist/build/up/up-tmp/Main.o )

src/Main.hs:18:1: error:
    Failed to load interface for ‘Pkg’
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-6999/up-grade-0.0.1'
cabal: Error: some packages failed to install:
up-grade-0.0.1 failed during the building phase. The exception was:
ExitFailure 1