ob run on OS X

[fabianpage]

Hi

I installed obelisk and created a new project with ob init. On ob run i got the following error:
(OS X 10.14, nix --version: 2.1.3) Can somebody give me a hint what's wrong?

    ʎ ob run
    Loading ghci -Wall -ignore-dot-ghci -fwarn-redundant-constraints -ghci-script /private/var/folders/t6/hwn93hhs2_s7w8d4v5450j000000gn/T/ob-ghci-e24c9db219549827/.ghci ...
    GHCi, version 8.4.3: http://www.haskell.org/ghc/  :? for help
    [1 of 4] Compiling Common.Api       ( common/src/Common/Api.hs, interpreted )
    [2 of 4] Compiling Common.Route     ( common/src/Common/Route.hs, interpreted )
    
    common/src/Common/Route.hs:24:1: error:
        Could not find module ‘Obelisk.Route’
        Use -v to see a list of the files searched for.
       |
    24 | import Obelisk.Route
       | ^^^^^^^^^^^^^^^^^^^^
    
    common/src/Common/Route.hs:25:1: error:
        Could not find module ‘Obelisk.Route.TH’
        Use -v to see a list of the files searched for.
       |
    25 | import Obelisk.Route.TH
       | ^^^^^^^^^^^^^^^^^^^^^^^
    Failed, one module loaded.
    
    <no location info>: error:
        Could not find module ‘Obelisk.Run’
        It is not a module in the current program, or in any known package.
    
    <no location info>: error:
        Could not find module ‘Frontend’
        It is not a module in the current program, or in any known package.
    
    <no location info>: error:
        Could not find module ‘Backend’
        It is not a module in the current program, or in any known package.
    Loaded GHCi configuration from /private/var/folders/t6/hwn93hhs2_s7w8d4v5450j000000gn/T/ob-ghci-e24c9db219549827/.ghci
    
    common/src/Common/Route.hs:24:1: error:
        Could not find module ‘Obelisk.Route’
        Use -v to see a list of the files searched for.
       |
    24 | import Obelisk.Route
       | ^^^^^^^^^^^^^^^^^^^^
    common/src/Common/Route.hs:25:1: error:
        Could not find module ‘Obelisk.Route.TH’
        Use -v to see a list of the files searched for.
       |
    25 | import Obelisk.Route.TH
       | ^^^^^^^^^^^^^^^^^^^^^^^

[EvanMisshula]

+1 . same issue

[EvanMisshula]

Check that brew doctor says that your system is in good shape. My /usr/local/sbin was not linked. For me what worked was deleting Nix as per NixOS/nix#1402. Pay special attention to deleting any reference to Nix in ~/.profile or ~/.bash_profile. Additionally I deleted /etc/nix/ and also deleted ghc, cabal2nix, cabal-install and haskell-stack. After I installed Nix via https://github.com/Gabriel439/haskell-nix and cabal2nix, cabal-install and nix-prefetch-git. Next I followed the directions to install Obelisk including modifying /etc/nix/nix.conf. I was then able able to create a new obtest directory. Running $ ob init and $ ob run in that directory proceeded without error. My environment is (Mojave 10.14.1, nix 2.1.3, cabal-install 2.4.0.0 and cabal2nix 2.11.1) @ryantrinkle , I believe this issue can now be closed.

[dalaing]

I'm getting this exact error in NixOS, when I do ob init and then ob run in a new directory.

[dalaing]

... and after a NixOS update and a garbage collection it has gone away.

[luigy]

@dalaing would you happen to have a way to repro it? could this have been triggered by a system update ?

[ali-abrar]

I can't reproduce this on macOS Mojave 10.14.3. Please reopen if you're still having difficulty after updating obelisk.

[pkaterski]

Check that brew doctor says that your system is in good shape. My /usr/local/sbin was not linked. For me what worked was deleting Nix as per NixOS/nix#1402. Pay special attention to deleting any reference to Nix in ~/.profile or ~/.bash_profile. Additionally I deleted /etc/nix/ and also deleted ghc, cabal2nix, cabal-install and haskell-stack. After I installed Nix via https://github.com/Gabriel439/haskell-nix and cabal2nix, cabal-install and nix-prefetch-git. Next I followed the directions to install Obelisk including modifying /etc/nix/nix.conf. I was then able able to create a new obtest directory. Running $ ob init and $ ob run in that directory proceeded without error. My environment is (Mojave 10.14.1, nix 2.1.3, cabal-install 2.4.0.0 and cabal2nix 2.11.1) @ryantrinkle , I believe this issue can now be closed.

Had the same problem. This also fixed it on Catalina