Resolving dependencies...
Configuring concatenative-1.0.1...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building concatenative-1.0.1...
Installed concatenative-1.0.1
Configuring text-1.2.2.1...
Building text-1.2.2.1...
Installed mtl-2.2.1
Configuring regex-base-0.93.2...
Building regex-base-0.93.2...
Installed regex-base-0.93.2
Configuring regex-posix-0.95.2...
Building regex-posix-0.95.2...
Installed regex-posix-0.95.2
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Configuring indents-0.3.3...
Building indents-0.3.3...
Installed indents-0.3.3
Configuring herbalizer-0.4.5...
Building herbalizer-0.4.5...
Failed to install herbalizer-0.4.5
Build log ( /home/builder/.cabal/logs/herbalizer-0.4.5.log ):
cabal: Entering directory '/tmp/cabal-tmp-18259/herbalizer-0.4.5'
Configuring herbalizer-0.4.5...
Building herbalizer-0.4.5...
Preprocessing executable 'herbalizer' for herbalizer-0.4.5...
[1 of 1] Compiling Main             ( src/Main.hs, dist/build/herbalizer/herbalizer-tmp/Main.o )

src/Main.hs:14:1: error:
    Failed to load interface for ‘Utils’
    Perhaps you meant Util (needs flag -package-key ghc-8.0.1.20161018)
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-18259/herbalizer-0.4.5'
cabal: Error: some packages failed to install:
herbalizer-0.4.5 failed during the building phase. The exception was:
ExitFailure 1