Resolving dependencies... Configuring mersenne-random-pure64-0.2.0.4... Building mersenne-random-pure64-0.2.0.4... Preprocessing library mersenne-random-pure64-0.2.0.4... [1 of 3] Compiling System.Random.Mersenne.Pure64.Base ( dist/build/System/Random/Mersenne/Pure64/Base.hs, dist/build/System/Random/Mersenne/Pure64/Base.o ) [2 of 3] Compiling System.Random.Mersenne.Pure64.MTBlock ( System/Random/Mersenne/Pure64/MTBlock.hs, dist/build/System/Random/Mersenne/Pure64/MTBlock.o ) [3 of 3] Compiling System.Random.Mersenne.Pure64 ( System/Random/Mersenne/Pure64.hs, dist/build/System/Random/Mersenne/Pure64.o ) In-place registering mersenne-random-pure64-0.2.0.4... Running Haddock for mersenne-random-pure64-0.2.0.4... Running hscolour for mersenne-random-pure64-0.2.0.4... Preprocessing library mersenne-random-pure64-0.2.0.4... Preprocessing library mersenne-random-pure64-0.2.0.4... Warning: The documentation for the following packages are not installed. No links will be generated to these packages: rts-1.0, random-1.0.1.1 Haddock coverage: 19% ( 3 / 16) in 'System.Random.Mersenne.Pure64.Base' 90% ( 9 / 10) in 'System.Random.Mersenne.Pure64.MTBlock' Cannot find documentation for: $notes 100% ( 13 / 13) in 'System.Random.Mersenne.Pure64' Warning: System.Random.Mersenne.Pure64: could not find link destinations for: System.Random.RandomGen System.Random.split Documentation created: dist/doc/html/mersenne-random-pure64/index.html Installing library in /srv/hackage/var/build/tmp-install/lib/mersenne-random-pure64-0.2.0.4/ghc-7.6.3 Registering mersenne-random-pure64-0.2.0.4... Installed mersenne-random-pure64-0.2.0.4 Downloading randomgen-0.1... Configuring randomgen-0.1... cabal: Missing dependency on a foreign library: * Missing C library: crypto This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. Failed to install randomgen-0.1 cabal: Error: some packages failed to install: randomgen-0.1 failed during the configure step. The exception was: ExitFailure 1