I recently installed stack via Haskell for Mac OS X (https://ghcformacosx.github.io/), which gave me stack 0.1.8.0 x86_64 and ghc 7.10.2. Following the User Guide (http://docs.haskellstack.org/en/stable/GUIDE.html), I tried to create the first example (hello world, naturally). Everything went according to plan until I entered 'stack test', which failed. The output was supposed to be, 'Test suite not yet implemented.' I tried to find information online, but was unsuccessful. I play with Haskell for fun and know nothing about cabal, so I don't know if it is a cabal issue. The error message includes 'helloworld-test: executable not found'. helloworld-test is indeed missing. I searched for it using find: find . -name '*test' Here is the terminal session, followed by the contents of the generated helloworld.cabal file (with some user info removed): $ stack new helloworld new-template Downloading template "new-template" to create project "helloworld" in helloworld/ ... Writing default config file to: /Users/rpw/self/haskell/stack/user_guide/helloworld/stack.yaml Basing on cabal files: - /Users/rpw/self/haskell/stack/user_guide/helloworld/helloworld.cabal Checking against build plan lts-3.13 Selected resolver: lts-3.13 Wrote project config to: /Users/rpw/self/haskell/stack/user_guide/helloworld/stack.yaml $ cd helloworld/ $ stack setup stack will use the GHC on your PATH For more information on paths, see 'stack path' and 'stack exec env' To use this GHC and packages outside of a project, consider using: stack ghc, stack ghci, stack runghc, or stack exec $ stack build helloworld-0.1.0.0: configure Configuring helloworld-0.1.0.0... helloworld-0.1.0.0: build Preprocessing library helloworld-0.1.0.0... [1 of 1] Compiling Lib ( src/Lib.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.4.0/build/Lib.o ) In-place registering helloworld-0.1.0.0... Preprocessing executable 'helloworld-exe' for helloworld-0.1.0.0... [1 of 1] Compiling Main ( app/Main.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.4.0/build/helloworld-exe/helloworld-exe-tmp/Main.o ) Linking .stack-work/dist/x86_64-osx/Cabal-1.22.4.0/build/helloworld-exe/helloworld-exe ... helloworld-0.1.0.0: copy/register Installing library in /Users/rpw/self/haskell/stack/user_guide/helloworld/.stack-work/install/x86_64-osx/lts-3.13/7.10.2/lib/x86_64-osx-ghc-7.10.2/helloworld-0.1.0.0-6urpPe0MO7OHasGCFSyIAT Installing executable(s) in /Users/rpw/self/haskell/stack/user_guide/helloworld/.stack-work/install/x86_64-osx/lts-3.13/7.10.2/bin Registering helloworld-0.1.0.0... $ stack exec helloworld-exe someFunc $ stack test Test suite helloworld-test executable not found for helloworld Test suite failure for package helloworld-0.1.0.0 helloworld-test: executable not found Logs printed to console $ cat helloworld.cabal name: helloworld version: 0.1.0.0 synopsis: Initial project template from stack description: Please see README.md homepage: ... license: BSD3 license-file: LICENSE author: ... maintainer: ... copyright: None category: Example build-type: Simple -- extra-source-files: cabal-version: >=1.10 library hs-source-dirs: src exposed-modules: Lib build-depends: base >= 4.7 && < 5 default-language: Haskell2010 executable helloworld-exe hs-source-dirs: app main-is: Main.hs ghc-options: -threaded -rtsopts -with-rtsopts=-N build-depends: base , helloworld default-language: Haskell2010 test-suite helloworld-test type: exitcode-stdio-1.0 hs-source-dirs: test main-is: Spec.hs build-depends: base , helloworld ghc-options: -threaded -rtsopts -with-rtsopts=-N default-language: Haskell2010 source-repository head type: git location: ... $ Robert Weisser