Requires 'pkg-config' during installation

[oluckyman]

I'm newbie in haskell development.
I've made new stack project and added these lines:

# stack.yaml

extra-deps:
- ffmpeg-light-0.12.1.0

# package.yaml

dependencies:
- ffmpeg-light

then I ran:

stack build

and got this error:

Cabal-simple_mPHDZzAJ_2.0.1.0_ghc-8.2.2: The program 'pkg-config' version >=0.9.0 is required but it could not be found.

I'm on macOS 10.13.4

[Krantz-XRF]

I know this is an old post, but in case anyone may need this information......

Basically, you need pkg-config to track dependencies on external C libraries. I believe you could install pkg-config from your package manager.

[jcberentsen]

I just encountered this on macOS (Catalina)
Doing brew install pkg-config solved it for me.

[acowley]

Is there something we can do to the package definition to make this easier for folks, or is this a broader question of sorting out Haskell tooling in a development environment?