[Bug]: salt.modules.pip.install does not use proxy when checking package versions

Description

When using salt.modules.pip.install behind a corporate proxy, package installation works correctly when the proxy is provided through any of the following methods:

• proxy argument of salt.modules.pip.install
• /etc/salt/minion.d/00_proxy.conf

Package installation succeeds in all tested cases.

However, during the second execution of the state, Salt performs a package version check without using the configured proxy, which causes a timeout on systems that require a proxy for internet access.

/usr/bin/salt-pip --disable-pip-version-check index versions XXX

This command does not appear to use any proxy configuration and eventually times out.

Type of salt install

Official rpm

Major version

3008.x

What supported OS are you seeing the problem on? Can select multiple. (If bug appears on an unsupported OS, please open a GitHub Discussion instead)

rockylinux-9

salt --versions-report output

Salt Version:
          Salt: 3008.2
 
Python Version:
        Python: 3.14.6 (main, Jun 11 2026, 02:19:05) [GCC 11.2.0]
 
Dependency Versions:
          cffi: 2.0.0
      cherrypy: 18.10.0
  cryptography: 48.0.0
      dateutil: 2.9.0.post0
     docker-py: Not Installed
         gitdb: 4.0.12
     gitpython: 3.1.50
        Jinja2: 3.1.6
       libgit2: Not Installed
  looseversion: 1.3.0
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 1.1.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     packaging: 24.0
     pycparser: 3.00
      pycrypto: Not Installed
  pycryptodome: 3.23.0
        pygit2: Not Installed
  python-gnupg: 0.5.6
        PyYAML: 6.0.3
         PyZMQ: 27.1.0
        relenv: 0.22.14
         smmap: 5.0.2
       timelib: 0.3.0
       Tornado: 6.5.7
           ZMQ: 4.3.5
 
Salt Package Information:
  Package Type: onedir
 
System Versions:
          dist: rocky 9.8 Blue Onyx
        locale: utf-8
       machine: x86_64
       release: 5.14.0-687.29.1.el9_8.x86_64
        system: Linux
       version: Rocky Linux 9.8 Blue Onyx

Start at the salt.modules.pip.install entry point and reproduce the second state execution with the proxy configured through the argument or 00_proxy.conf. Compare the package installation with the /usr/bin/salt-pip --disable-pip-version-check index versions XXX check; done means the version check uses the configured proxy and does not time out.