haskell-dev - Possibly broken

Context: I'm trying to install the Haskell platform following the steps listed here. Below are the messages I'm seeing in Powershell which don't at all match what I'm seeing @3:10 from individuals who are successfully able to follow the installation steps. Below line seems to imply something with the dependencies is broken...

haskell-dev v0.0.1 [Approved] - Possibly broken

I see there are instructions for upgrading from the old-style haskell-platform installer to the haskell-dev installer which I've followed. I think at some point I did install an older version of Haskell on this machine. Following the instructions for upgrading the old-style installer however does not seem to work.

What I see when running the install instructions:

PS C:\Windows\system32> choco install haskell-dev
Chocolatey v0.10.15
Installing the following packages:
haskell-dev
By installing you accept licenses for the packages.
Progress: Downloading haskell-dev 0.0.1... 100%

haskell-dev v0.0.1 [Approved] - Possibly broken
haskell-dev package files install completed. Performing other installation steps.
 The install of haskell-dev was successful.
  Software install location not explicitly set, could be in package or
  default install location if installer.

Chocolatey installed 1/1 packages.
 See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).

Enjoy using Chocolatey? Explore more amazing features to take your
experience to the next level at
 https://chocolatey.org/compare
PS C:\Windows\system32> ghci
ghci : The term 'ghci' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of
the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ ghci
+ ~~~~
    + CategoryInfo          : ObjectNotFound: (ghci:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

PS C:\Windows\system32>

What others see after successful installation:

Questions: What am I doing wrong? If I do indeed still have an old distribution of Haskell that I need to uninstall what set of steps do I need to follow to find/uninstall properly -- then reinstall with the newer version via the haskell-dev installer? Should I revert to trying to use the older installment method or (as I'm guessing) has that been deprecated for good reason?

I had the same challenge while installing.

Try: > choco install haskell-dev --force --force-dependencies

Forcing the dependencies did the trick for me.

With --force you won't get an error on an already installed instance.

Don't forget the > refreshenv before testing.