Since I started using 1.10.0-beta2 as my daily driver I sporadically run into the same issue, but nothing I can reproduce. If I delete the read-only artifact and add it again, it works.
For instance, this just happened randomly with LibPQ_jll: [GDAL] fix version_offset by visr · Pull Request #7412 · JuliaPackaging/Yggdrasil (github.com), where all files in the artifact were suddenly mode: 0o100444 (-r--r--r--) instead of mode: 0o100666 (-rw-rw-rw-).
julia> versioninfo()
Julia Version 1.10.0-beta2
Commit a468aa198d (2023-08-17 06:27 UTC)
Build Info:
Official https://julialang.org/ release
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: 24 × 12th Gen Intel(R) Core(TM) i7-12800HX
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-15.0.7 (ORCJIT, alderlake)
Threads: 23 on 24 virtual cores
Environment:
JULIA_EDITOR = code
JULIA_NUM_THREADS = 16
JULIA_PKG_PRESERVE_TIERED_INSTALLED = true
JULIA_PKG_SERVER = juliahub.com
JULIA_PKG_USE_CLI_GIT = true
JULIA_PROJECT = @.