mev-boost Upcoming Pectra mev-boost release: v1.9

We are preparing for an upcoming Pectra-ready mev-boost release: v1.9

ETA for the first release candidate is Tuesday, Feb. 4.

This is the main PR for the Electra changes: https://github.com/flashbots/mev-boost/pull/651

Other changes since v1.8: https://github.com/flashbots/mev-boost/compare/v1.8...develop

h/t to @jtraglia for implementing the majority of Electra related changes!

Jan 31 '25 14:01 metachris

Published our first release candidate here:

https://github.com/flashbots/mev-boost/releases/tag/v1.9-rc2

Feb 04 '25 18:02 jtraglia

When will non-rc tag be created?

Apr 21 '25 16:04 t10471

When will non-rc tag be created?

Hey @t10471, very soon 🙂 probably in the next couple days.

Apr 21 '25 16:04 jtraglia

hello there, not able to install mev-boost v1.9 (required update for the upcoming Pectra upgrade) using the command go install github.com/flashbots/[email protected] --> no matching versions for query "v1.9" go install github.com/flashbots/mev-boost@latest --> still goes to v1.8.1 go install github.com/flashbots/[email protected] --> invalid version: unknown revision v1.9.0

why is this?

Apr 22 '25 22:04 hernanirvaz

Same issue. Can't install v1.9 using go install

Apr 22 '25 23:04 Devnant

Hi there @hernanirvaz & @Devnant, thanks for bringing this up! It looks like I forgot to tag v1.9.0 (in addition to v1.9). Apparently, pkg.go.dev only recognizes semantic versioning and v1.9 is not valid there. I've just made a new v1.9.0 tag and can confirm that go install github.com/flashbots/[email protected] works now.

Apr 23 '25 01:04 jtraglia

Running mev-boost --version from the release asset https://github.com/flashbots/mev-boost/releases/download/v1.9/mev-boost_1.9_linux_amd64.tar.gz return

INFO[0000] mev-boost 1.8

There might be a version info issue with the release.

Apr 25 '25 19:04 remyroy

Running mev-boost --version from the release asset https://github.com/flashbots/mev-boost/releases/download/v1.9/mev-boost_1.9_linux_amd64.tar.gz return
INFO[0000] mev-boost 1.8
There might be a version info issue with the release.

Hey @remyroy, I think you might be running the binary installed on your system. Could you try running ./mev-boost after unpacking the tarfile? For example:

Apr 25 '25 22:04 jtraglia

It could have been on me too. When I updated and relaunched my service it showed version 1.9.

Apr 25 '25 22:04 remyroy

Closing this issue, since we are preparing for the upcoming Fulu release!

Sep 26 '25 11:09 bharath-123