Resolving dependencies...
cabal: Entering directory '/tmp/cabal-tmp-21716/cmph-0.0.1'
Configuring cmph-0.0.1...
Building cmph-0.0.1...
Preprocessing library cmph-0.0.1...
[1 of 1] Compiling Data.CMPH        ( Data/CMPH.hs, dist/build/Data/CMPH.o )
stub.c: In function ‘free_ptrs’:

stub.c:44:3: error:
     error: ‘for’ loop initial declarations are only allowed in C99 mode
       for (unsigned int i = 0; i<nkeys; i++) {
       ^

stub.c:44:3: error:
     note: use option -std=c99 or -std=gnu99 to compile your code
`gcc' failed in phase `C Compiler'. (Exit code: 1)
cabal: Leaving directory '/tmp/cabal-tmp-21716/cmph-0.0.1'
Failed to install cmph-0.0.1
cabal: Error: some packages failed to install:
cmph-0.0.1 failed during the building phase. The exception was:
ExitFailure 1