How to add dependency with odd dependencies itself

[mwawra]

Hi,
I want to run a very old project which requires qt 4.8.7 and python 3.5.
The problem is that qt depends among other things on "jpeg 9.*, jpeg >=9c,<10a".
Pixi is not able to solve that:

matthias@nb:~/tools$ pixi init test
matthias@nb:~/tools$ cd test
matthias@nb:~/tools/test$ pixi add qt==4.8.*
Error:   × failed to solve requirements of environment 'default' for platform 'linux-64'
  ├─▶   × failed to solve the environment
  │   
  ╰─▶ Cannot solve the request because of: qt 4.8.* cannot be installed because there are no viable options:
      └─ qt 4.8.7 would require
         └─ jpeg 9.*, for which no candidates were found.

Conda can solve and install qt4.8.7 without a problem. Also pixi can install qt5.6.2 (where they discarded the first part of the jpeg dependency).
Is there any way to ignore/override just the dependency "jpeg 9.*" for qt or do you know another workaround?