Resolving dependencies... Configuring sat-1.1.1... Building sat-1.1.1... Failed to install sat-1.1.1 Build log ( /home/builder/.cabal/logs/sat-1.1.1.log ): cabal: Entering directory '/tmp/cabal-tmp-27433/sat-1.1.1' [1 of 1] Compiling Main ( /tmp/cabal-tmp-27433/sat-1.1.1/dist/setup/setup.hs, /tmp/cabal-tmp-27433/sat-1.1.1/dist/setup/Main.o ) Linking /tmp/cabal-tmp-27433/sat-1.1.1/dist/setup/setup ... Configuring sat-1.1.1... Warning: No 'build-type' specified. If you do not need a custom Setup.hs or ./configure script then use 'build-type: Simple'. Building sat-1.1.1... Preprocessing executable 'SATSolve' for sat-1.1.1... [1 of 1] Compiling Main ( SATSolver.hs, dist/build/SATSolve/SATSolve-tmp/Main.o ) SATSolver.hs:26:1: error: Failed to load interface for ‘System.Random’ Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-27433/sat-1.1.1' cabal: Error: some packages failed to install: sat-1.1.1 failed during the building phase. The exception was: ExitFailure 1