Symlink errors? Failures when downloading; "Something went wrong"

Description

Paket has started throwing lots of errors while restoring in the latter releases:

-version 5.226.0
-clitool paket 5.226.0
+version 5.241.5
+clitool paket 5.241.5

or:

 Downloading fake-cli 5.19.0 (Build)
 Download of fake-cli 5.19.0 (Build) done in 1 second. (53127 kbit/s, 7 MB)
 Downloading Http.fs 5.3
 Something went wrong while downloading System.Diagnostics.PerformanceCounter 4.5
 Message: Start of process ln failed.
   ==> Trying again
 Downloading Argu 5.5
 Downloading System.Diagnostics.PerformanceCounter 4.5
 Something went wrong while downloading runtime.rhel.7-x64.runtime.native.System.    Security.Cryptography.OpenSsl 4.3.3
 Message: Start of process ln failed.
   ==> Trying again

Repro steps

Please provide the steps required to reproduce the problem

1. .paket/paket install

Expected behavior

Please provide a description of the behavior you expect.

Paket should not corrupt installs or else it should say what's wrong, not just "Something went wrong", as that's not a proper error message to act on.

Known workarounds

Downgrade? Perhaps it's .net 3.1-based?

Another output:

Downloading Paket 5.241.5
Download of System.Runtime.InteropServices 4.3 done in 373 milliseconds. (55700 kbit/s, 2 MB)
Not moving as '/Users/h/.nuget/packages/paket/5.241.5/paket.5.241.5.nupkg' already exists (maybe some other instance downloaded it as well)
Download of Paket 5.241.5 done in 2 seconds. (23799 kbit/s, 5 MB)
Performance:
 - Resolver: 28 seconds (2 runs)
    - Runtime: 1 second
    - Blocked (retrieving package details): 26 seconds (329 times)
    - Blocked (retrieving package versions): 1 second (2 times)
 - Disk IO: 1 second
 - Average Download Time: 187 milliseconds
 - Number of downloads: 10
 - Average Request Time: 61 milliseconds
 - Number of Requests: 528
 - Runtime: 36 seconds
Paket failed with
-> Could not find nuspec in '/Users/h/dev/app/packages/Paket', try deleting the directory and restoring again.

Same issue with 6.0.0-alpha011.

Start with the reported .paket/paket install reproduction and compare Paket 5.226.0, 5.241.5, and 6.0.0-alpha011 output, focusing on the failed ln process and missing nuspec. Done means identifying the regression and ensuring installs either complete without corruption or report an actionable error.