Hi Franco,
I've seen this problem when you do not have ~/.cabal/bin in your path. Can you re-try cabal install Euterpea after adding ~/.cabal/bin in your path. Also, just check if ~/.cabal/bin has cca executable in there or not. Regards, Kashyap
I have added the directory to PATH, unfortunately compile fails with the same error: src/Language/Haskell/TH/Instances.hs:175:18: Template Haskell splice illegal in a stage-1 compiler return (LitE (DoublePrimL (toRational d))) cabal: Error: some packages failed to install: CCA-0.1.3 failed during the building phase. The exception was: ExitFailure 1 demo@efikamx:~/Desktop/media/git/Euterpea$ $ echo $PATH /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/home/demo/.cabal/bin there is no cca executable in ~/.cabal/bin I will try to see if other packages will do. Thanks! -F