* gnu/packages/coq.scm (coq): Update to 8.15.0.
(coq-equations): Update to 1.3-8.15.
* gnu/packages/patches/coq-fix-envvars.patch: Adapt to new version.
* gnu/packages/coq.scm (coq): Update to 8.14.0.
(coq-bignums): Update to 8.14.0.
(coq-equations): Update to 1.3.
* gnu/packages/patches/coq-fix-envvars.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.