[Bug]: ridk install error UTF-8 German computer scoop prefix msys2

[Dorirrst]

Prerequisites

• I have written a descriptive issue title.
• I have searched all issues/PRs to ensure it has not already been reported or fixed.
• I have verified that I am using the latest version of Scoop and corresponding bucket.

Package Name

ruby

Expected/Current Behaviour

Hi,

I installed ruby and msys2 and want to run ridk install but face an error: Installation failed: invalid byte sequence in UTF-8
If I run ridk install 1 I have more infos : C:/Users/*****/scoop/apps/ruby/4.0.1-1/lib/ruby/site_ruby/4.0.0/ruby_installer/runtime/msys2_installation.rb:103:in 'String#strip': invalid byte sequence in UTF-8 (Encoding::CompatibilityError)

Which refers to :

 begin
       yield IO.popen(["scoop", "prefix", "msys2"], &:read).strip
      rescue SystemCallError
end

If I change it to, this below, it is realizing that
MSYS2 seems to be unavailable
Download https://repo.msys2.org/distrib/x86_64/msys2-x86_64-20251213.exe

begin
  output = IO.popen(["scoop", "prefix", "msys2"], &:read)
  output = output.force_encoding('UTF-8').scrub if output
  yield output.strip if output
  rescue SystemCallError, Encoding::CompatibilityError
end

I had msys2 installed with scoop but I think the scoop prefix msys2 could not be read for anyreason.
I try to change a lot of language settings but it was not helping at all.
what I tried:

chcp 65001
Set-Culture en-US
$env:LANG = "en_US.UTF-8"
$env:LC_ALL = "en_US.UTF-8"

Maybe it can help you to troubleshoot this.
Thanks

Steps to Reproduce

scoop install ruby
scoop install msys2
msys2
# close and reopen
ridk install
ridk install 1

Possible Solution

Adapt msys2_installation.rb as described above.

Scoop and Buckets Version

Current Scoop version:
b588a06e (HEAD -> master, tag: v0.5.3, origin/master, origin/HEAD) chore(release): Bump to version 0.5.3 (resync) (#6436)

'main' bucket:
78785a2005 (HEAD -> master, origin/master, origin/HEAD) slang: Update to version 2026.4

'extras' bucket:
d07d35dee8 (HEAD -> master, origin/master, origin/HEAD) imagine@2.5.2: Fix hash (Closes #17369)

'versions' bucket:
c9d5c685dd (HEAD -> master, origin/master, origin/HEAD) yazi-nightly: Update to version 741f84e

'sysinternals' bucket:
ddd5c31 (HEAD -> main, origin/main, origin/HEAD) sysinternals-suite: Update to version 2026.03.05

'nerd-fonts' bucket:
a3a34c44 (HEAD -> master, origin/master, origin/HEAD) Dream-Han-Serif: Update to version 3.03

Scoop Config

last_update                       scoop_repo                              scoop_branch
-----------                       ----------                              ------------
2026-03-07T12:39:18.1380931+01:00 https://github.com/ScoopInstaller/Scoop master

PowerShell Version

Name                           Value
----                           -----
PSVersion                      5.1.26100.7705
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.26100.7705
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Additional Softwares

No response

[z-Fng]

Adapt msys2_installation.rb as described above.

Thank you for bringing this to our attention.

However, I believe this should be fixed within RubyInstaller itself. You can report this issue in their repository, , as that code is outside of our control.

https://github.com/oneclick/rubyinstaller2/blob/7515ba04ce9d84d003d474eb4b84c5568bf2af2e/lib/ruby_installer/build/msys2_installation.rb#L105