Mirrors are servers located around the world that store copies of software packages. When upgrading packages, your EndeavourOS system utilizes multiple mirrors, which are noted in a mirrorlist.

A well-maintained mirrorlist ensures the pacman package manager can access up-to-date package files when performing system updates. Outdated mirrors can prevent pacman from updating core packages.

Update the Arch mirrorlist by running:

  $ reflector-simple

  1. Adjust your preferences in the reflector-simple GUI tool. You can choose the number of mirrors to store in your mirrorlist, the country of origin, and ranks based on speed or age.

    • By default, reflector-simple selects the 20 fastest mirrors based on your location.

    reflector-simple graphical tool showing options such as mirror location and ranking priority.

  2. Hit OK to confirm the selection and run the process. It is normal to see warnings as reflector tests various mirrors for connectivity speed and age.

    eos-rankmirrors terminal output listing timed-out mirrors and the new mirrorlist.

  3. The system will notify you once the new Arch mirrorlist has been generated. Save to apply the configuration changes.

  4. Refresh the system to sync the newly obtained mirrors with the Arch package databases:

      $ yay -Syyu

Endeavour OS has its own distro-unique packages, which may be slightly modified versions of Arch packages.

Update the Endeavour OS mirrorlist with:

  $ eos-rankmirrors

  1. The terminal may display errors/warnings as the system tests various mirrors for connectivity and speed. It may take a few minutes to find the requisite amount of mirrors.

    • By default, the new mirrorlist lists 20 fastest mirrors, comparing them with the original list.

    eos-rankmirrors terminal output listing timed-out mirrors and the new mirrorlist.

  2. Confirm and save the changes, then refresh the system with:

      $ yay -Syyu

If you do NOT wish to make the mirrorlist changes, stop the terminal process. By default, this shortcut is bound to Ctrl+C in the terminal.

Common issues: outdated mirrors

When pacman receives a command to update packages and refresh the system, it attempts to connect to the package databases stored in mirrors. Outdated mirrors can prevent pacman from updating your system to the newest packages.

Error messageProbable cause
GPGME error: No dataFiles from the package database are outdated or corrupt
failed to synchronize all databasesOutdated mirrors - not in sync with the most recent package databases
The requested URL returned error: 404Mirror cannot be reached - most likely outdated and expired.
failed to commit transactionMirror cannot be reached, or package files are not available .
too many errors from arch.mirror.mxSlow/unstable mirror connection (timed out) or network issues.

If pacman runs into these errors during a system update, be sure to rerank mirrors before another update attempt.

If these errors/warnings persist despite re-ranking mirrors, this may indicate outdated packages and require updating with pacman and yay.

See: Update packages guide

Last updated 12 Jun 2026, 18:00 -0700. history