Resolving dependencies...
Starting     kqueue-0.2.1
Building     kqueue-0.2.1
Failed to install kqueue-0.2.1
Build log ( /home/builder/.cabal/logs/ghc-8.10.2/kqueue-0.2.1-AhrbMFym2Q8Ek0UUBJ3jSN.log ):
cabal: Entering directory '/tmp/cabal-tmp-31921/kqueue-0.2.1'
Configuring kqueue-0.2.1...
Preprocessing library for kqueue-0.2.1..
dist/build/System/KQueue.chs.h:3:10: 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-31921/kqueue-0.2.1'
cabal: Error: some packages failed to install:
kqueue-0.2.1-AhrbMFym2Q8Ek0UUBJ3jSN failed during the building phase. The
exception was:
ExitFailure 1