Hi Brandon, thanks for the suggestion. Unfortunately, it didn't do the trick: [0 :)] badi@olorin /private/tmp/sb ~> export PATH=/tmp/sb/.cabal-sandbox/bin:$PATH [0 :)] badi@olorin /tmp/sb ~> cabal install happy alex Resolving dependencies... Notice: installing into a sandbox located at /private/tmp/sb/.cabal-sandbox Configuring alex-3.1.0... Configuring happy-1.19.0... Building alex-3.1.0... Building happy-1.19.0... Failed to install happy-1.19.0 Last 10 lines of the build log ( /private/tmp/sb/.cabal-sandbox/logs/happy-1.19.0.log ): Building happy-1.19.0... Preprocessing executable 'happy' for happy-1.19.0... setup: The program happy is required but it could not be found Failed to install alex-3.1.0 Last 10 lines of the build log ( /private/tmp/sb/.cabal-sandbox/logs/alex-3.1.0.log ): Building alex-3.1.0... Preprocessing executable 'alex' for alex-3.1.0... setup: The program happy is required but it could not be found cabal: Error: some packages failed to install: alex-3.1.0 failed during the building phase. The exception was: ExitFailure 1 happy-1.19.0 failed during the building phase. The exception was: ExitFailure 1 On Thu, Oct 31, 2013 at 7:34 PM, Brandon Allbery wrote:

On Thu, Oct 31, 2013 at 1:18 PM, Erik de Castro Lopo

...

wrote:

...

Badi' Abdul-Wahid wrote:

...

I've run into difficulty building happy and alex using the sandbox feature of cabal-install 1.18.0.2. Installation of dependencies succeeds but both happy and alex fail with:

setup: The program happy is required but it could not be found

My workaround is to use the --only-dependencies flag, install the dependencies, and manually install the packages.

I've run into this problem myself on Linux. My solution is to install ghc, happy, alex, hlint and cabal-install from debian packages and everything else using cabal install (either with or without using sandboxes).

At a guess, both of you need to find the bin directory created *in the sandbox* and add it to $PATH while working in the sandbox. Perhaps there is some better way for cabal sandboxes to handle this automatically.

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net

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