How to run shake without stack - haskell

Question

I created the recommended build.sh file from the "Running" section of the Shake manual:
#!/bin/sh
mkdir -p _shake
ghc --make Shakefile.hs -v -rtsopts -threaded -with-rtsopts=-I0 -outputdir=_shake -o _shake/build && _shake/build "$#"
but running that script gives the following error:
[1 of 1] Compiling Main ( Shakefile.hs, _shake/Main.o )
Shakefile.hs:1:1: error:
Could not find module ‘Development.Shake’
Use -v (or `:set -v` in ghci) to see a list of the files searched for.
|
1 | import Development.Shake
| ^^^^^^^^^^^^^^^^^^^^^^^^
Shakefile.hs:2:1: error:
Could not find module ‘Development.Shake.Command’
Use -v (or `:set -v` in ghci) to see a list of the files searched for.
|
2 | import Development.Shake.Command
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Shakefile.hs:3:1: error:
Could not find module ‘Development.Shake.FilePath’
Use -v (or `:set -v` in ghci) to see a list of the files searched for.
|
3 | import Development.Shake.FilePath
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Shakefile.hs:4:1: error:
Could not find module ‘Development.Shake.Util’
Use -v (or `:set -v` in ghci) to see a list of the files searched for.
|
4 | import Development.Shake.Util
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I did cabal v2-install shake --installpath=bin, but still get the same error afterwards. I also tried bin/shake but get the same error.
I tried adding -package shake to the ghc command in the build.sh, but get this error:
<command line>: cannot satisfy -package shake
(use -v for more information)
Adding -v as suggested gives this error:
Glasgow Haskell Compiler, Version 8.8.4, stage 2 booted by GHC version 8.8.3
Using binary package database: /Users/avh4/.ghcup/ghc/8.8.4/lib/ghc-8.8.4/package.conf.d/package.cache
package flags [-package shake{package shake True ([])}]
loading package database /Users/avh4/.ghcup/ghc/8.8.4/lib/ghc-8.8.4/package.conf.d
<command line>: cannot satisfy -package shake
(use -v for more information)
What is the correct way to use Shake without Haskell stack (preferably using only ghc 8.8 installed with ghcup and/or with cabal-install v2 commands)?

Answer 1

I figured out I need to use the --lib flag with cabal new-install otherwise only the shake binary gets installed.
After running cabal new-install --lib shake, the original build.sh script with the addition of -package shake to the ghc arguments now works! And runhaskell -package shake Shakefile.hs also works now.