Resolving dependencies...
Downloading composition-prelude-1.5.0.2...
Configuring composition-prelude-1.5.0.2...
Building composition-prelude-1.5.0.2...
Failed to install composition-prelude-1.5.0.2
Build log ( /home/builder/.cabal/logs/ghc-8.2.2/composition-prelude-1.5.0.2-6khrFIUhstcFDEKSHRZyhE.log ):
cabal: Entering directory '/tmp/cabal-tmp-10867/composition-prelude-1.5.0.2'
Configuring composition-prelude-1.5.0.2...
Preprocessing library for composition-prelude-1.5.0.2..

src/Control/Composition.cpphs:37:0: error:
     error: #else without #if
     #else
     ^
   |
37 | #else
   | ^

src/Control/Composition.cpphs:39:0: error:
     error: #endif without #if
     #endif
     ^
   |
39 | #endif
   | ^

src/Control/Composition.cpphs:40:0: error:
     error: #endif without #if
     #endif
     ^
   |
40 | #endif
   | ^

src/Control/Composition.cpphs:41:0: error:
     error: #endif without #if
     #endif
     ^
   |
41 | #endif
   | ^

src/Control/Composition.cpphs:42:0: error:
     error: #endif without #if
     #endif
     ^
   |
42 | #endif
   | ^
`gcc' failed in phase `C pre-processor'. (Exit code: 1)
cabal: Leaving directory '/tmp/cabal-tmp-10867/composition-prelude-1.5.0.2'
cabal: Error: some packages failed to install:
composition-prelude-1.5.0.2-6khrFIUhstcFDEKSHRZyhE failed during the building
phase. The exception was:
ExitFailure 1