When changing package version: The value for the SHELL variable was not found in the /etc/shells file

[chanceymathews]

• I have read the README.md document
• I am using the latest version of Warehouse
• I am using the Flatpak package of Warehouse
• I have not found any other opened issues on the same topic

Describe the issue in detail

When I attempt to downgrade a package to an earlier version it fails and I get this message:

The value for the SHELL variable was not found in the /etc/shells file
This incident has been reported.

If there is any additional detail I can provide or things I can try that will help debug, let me know.

If applicable, provide steps to reproduce the issue

1. Choose a package > Version > Change Version and select any previous version from the list.
2. Click Change Version.
3. View will reset and will see a message "An error occurred while changing version." Clicking Details shows the full error message pasted above.

Screencast here:

Screencast.From.2026-02-09.16-48-26.mp4

Run flatpak run io.github.flattool.Warehouse in a terminal and if applicable, show any output

$ flatpak run io.github.flattool.Warehouse
F: Not sharing "/usr/share/icons" with sandbox: Path "/usr" is reserved by Flatpak
MESA-INTEL: warning: ../src/intel/vulkan/anv_formats.c:993: FINISHME: support more multi-planar formats with DRM modifiers
MESA-INTEL: warning: ../src/intel/vulkan/anv_formats.c:959: FINISHME: support YUV colorspace with DRM format modifiers
Error occurred while changing version
The value for the SHELL variable was not found in the /etc/shells file

This incident has been reported.