Resolving dependencies...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Installed mtl-2.2.1
Downloading kqueue-0.2...
Configuring kqueue-0.2...
Building kqueue-0.2...
Failed to install kqueue-0.2
Build log ( /home/builder/.cabal/logs/kqueue-0.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-27407/kqueue-0.2'
Configuring kqueue-0.2...
Building kqueue-0.2...
Preprocessing library kqueue-0.2...
dist/build/System/KQueue.chs.h:3:23: fatal error: sys/event.h: No such file or directory
 #include <sys/event.h>
                       ^
compilation terminated.
c2hs: Error during preprocessing custom header file
cabal: Leaving directory '/tmp/cabal-tmp-27407/kqueue-0.2'
cabal: Error: some packages failed to install:
kqueue-0.2 failed during the building phase. The exception was:
ExitFailure 1