Resolving dependencies...
Configuring data-default-class-0.1.2.0...
Configuring dlist-0.8.0.2...
Building data-default-class-0.1.2.0...
Building dlist-0.8.0.2...
Installed data-default-class-0.1.2.0
Configuring old-locale-1.0.0.7...
Building old-locale-1.0.0.7...
Installed dlist-0.8.0.2
Configuring random-1.1...
Building random-1.1...
Configuring data-default-instances-containers-0.0.1...
Installed old-locale-1.0.0.7
Building data-default-instances-containers-0.0.1...
Configuring data-default-instances-dlist-0.0.1...
Installed data-default-instances-containers-0.0.1
Building data-default-instances-dlist-0.0.1...
Configuring data-default-instances-old-locale-0.0.1...
Installed random-1.1
Building data-default-instances-old-locale-0.0.1...
Installed data-default-instances-dlist-0.0.1
Installed data-default-instances-old-locale-0.0.1
Configuring data-default-0.7.1.1...
Building data-default-0.7.1.1...
Installed data-default-0.7.1.1
Configuring X11-1.7...
Building X11-1.7...
Installed X11-1.7
Configuring xmonad-utils-0.1.3...
Building xmonad-utils-0.1.3...
Failed to install xmonad-utils-0.1.3
Build log ( /home/builder/.cabal/logs/xmonad-utils-0.1.3.log ):
cabal: Entering directory '/tmp/cabal-tmp-27255/xmonad-utils-0.1.3'
Configuring xmonad-utils-0.1.3...
Warning: 'ghc-options: -prof' is not necessary and will lead to problems when
used on a library. Use the configure flag --enable-library-profiling and/or
--enable-profiling.
Building xmonad-utils-0.1.3...
Preprocessing executable 'hxsel' for xmonad-utils-0.1.3...
[1 of 1] Compiling Main             ( src/Hxsel.hs, dist/build/hxsel/hxsel-tmp/Main.o )
Linking dist/build/hxsel/hxsel ...
Preprocessing executable 'hxput' for xmonad-utils-0.1.3...
[1 of 1] Compiling Main             ( src/Hxput.hs, dist/build/hxput/hxput-tmp/Main.o )

src/Hxput.hs:36:13: warning: [-Wunused-do-bind]
    A do-notation statement discarded a result of type
      ‘ghc-prim-0.5.0.0:GHC.Prim.Any’
    Suppress this warning by saying
      ‘_ <- ($) allocaXEvent processEvent dpy ty text’
Linking dist/build/hxput/hxput ...
Preprocessing executable 'hslock' for xmonad-utils-0.1.3...
[1 of 1] Compiling Main             ( dist/build/hslock/hslock-tmp/Hslock.hs, dist/build/hslock/hslock-tmp/Main.o )

src/Hslock.hsc:37:1: error:
    Failed to load interface for ‘Utils’
    Perhaps you meant Util (from ghc-8.0.1.20161018)
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-27255/xmonad-utils-0.1.3'
cabal: Error: some packages failed to install:
xmonad-utils-0.1.3 failed during the building phase. The exception was:
ExitFailure 1