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Description of problem:

As per https://projects.engineering.redhat.com/browse/RCM-34523

Buildroot can't be installed as libglvnd-1.0.1-0.6.git5baa1e5.el7 build is conflicting with mesa-17.2.3-8.20171019.el7
DEBUG util.py:257: file /usr/lib64/libGL.so.1 conflicts between attempted installs of mesa-libGL-17.2.3-8.20171019.el7.x86_64 and libglvnd-glx-1:1.0.1-0.6.git5baa1e5.el7.x86_64
DEBUG util.py:257: file /usr/lib64/libEGL.so.1 conflicts between attempted installs of libglvnd-egl-1:1.0.1-0.6.git5baa1e5.el7.x86_64 and mesa-libEGL-17.2.3-8.20171019.el7.x86_64
Apparently we also need to update mesa, to build mesa-18.0.4-1.20180530.el7, so 
this conflict is sorted out (I checked RPMs file lists)

Version-Release number of selected component (if applicable):

libglvnd-1.0.1-0.6.git5baa1e5.el7
mesa-17.2.3-8.20171019.el7

datura:~% brew -q latest-pkg rhel-7.6-build mesa
mesa-18.0.4-1.20180530.el7                rhel-7.6-buildroot-push  airlied

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:3059

the link provided doesn't work:
https://access.redhat.com/errata/RHSA-2018:3059

could you provide a solution for RHE 7.6?

(In reply to Daniele Tartarini from comment #7)
> the link provided doesn't work:
> https://access.redhat.com/errata/RHSA-2018:3059
> 
> could you provide a solution for RHE 7.6?

The fix is included in RHEL 7.7. Please update.