Resolving dependencies...
Configuring Diff-0.3.4...
Building Diff-0.3.4...
Installed Diff-0.3.4
Configuring diffcabal-0.1...
Building diffcabal-0.1...
Failed to install diffcabal-0.1
Build log ( /home/builder/.cabal/logs/diffcabal-0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-31996/diffcabal-0.1'
Configuring diffcabal-0.1...
Building diffcabal-0.1...
Preprocessing executable 'diffcabal' for diffcabal-0.1...
[1 of 1] Compiling Main             ( Main.hs, dist/build/diffcabal/diffcabal-tmp/Main.o )

Main.hs:27:1: error:
    Failed to load interface for ‘Control.OldException’
    Perhaps you meant Control.Exception (from base-4.9.0.0)
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-31996/diffcabal-0.1'
cabal: Error: some packages failed to install:
diffcabal-0.1 failed during the building phase. The exception was:
ExitFailure 1