How to modify cabal config file on windows

Question

I am installing Haskell on my desktop, which is windows system. I follow the instruction. It says: Modify your cabal config file (you can verify the location by running "cabal user-config init") to contain the following lines:

extra-prog-path: C:\Program Files\Haskell Platform\8.0.2\msys\usr\bin
extra-lib-dirs: C:\Program Files\Haskell Platform\8.0.2\mingw\lib
extra-include-dirs: C:\Program Files\Haskell Platform\8.0.2\mingw\include

I tried to call "cabal user-config init" in command prompt, but it doesn't work. Anyone know where should I call "cabal user-config init"?

Grane

Thanks guys. I solved it. Seems it is the firewall problem. I closed the firewall and reinstalled again, then it works. – Grane

Related Q: https://mcmap.net/q/1919293/-installing-haskell-on-windows-cabal-config/2157640 – Invoke