nothing provides perl(IPC::Run) Error

nothing provides perl(IPC::Run) Error

When installing certain packages on Rocky Linux 9 or AlmaLinux 9 (like postgresql15-devel, mock, or koji), you may run into this error:

Error:
 Problem: cannot install the best candidate for the job
  - nothing provides perl(IPC::Run) needed by ...

example:
Error:
 Problem: cannot install the best candidate for the job
  - nothing provides perl(IPC::Run) needed by postgresql15-devel-15.13-2PGDG.rhel9.x86_64 from pgdg15
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

Root Cause

The package perl(IPC::Run) is a dependency for some tools, especially testing or development-related ones. However, it's not available in the default BaseOS or AppStream repositories.

Instead, it’s located in:

• EPEL (Extra Packages for Enterprise Linux)
• CRB (CodeReady Builder)

These repositories are disabled by default on minimal or clean installations.

Solution

Enable the EPEL repository:

dnf install epel-release

Enable the CRB repository:

dnf config-manager --set-enabled crb

Install the missing module:

dnf install perl-IPC-Run

Now you can proceed with the original package installation without issues.