I just added the string [zrs] at the end of the zeoserver recipe, in a brand new buildout.cfg generated by 4.3.17 UnifiedInstaller.
On running buildout I got the following error:
We have the distribution that satisfies 'zc.lockfile==1.0.2'. Getting required 'transaction==1.1.1' We have the distribution that satisfies 'transaction==1.1.1'. Getting required 'zodbpickle>=0.6.0' required by ZODB 5.4.0. Picked: zodbpickle = 1.0.1 Version and requirements information containing transaction: [versions] constraint on transaction: 1.1.1 Requirement of ZODB3>=3.8: transaction>=1.1.0 Requirement of ZODB: transaction>=2.0.3 Requirement of transaction>=1.1.0: zope.interface While: Installing. Getting section zeoserver. Initializing section zeoserver. Installing recipe plone.recipe.zeoserver[zrs]. Error: The requirement ('transaction>=2.0.3') is not allowed by your [versions] constraint (1.1.1)
No other package or configurtion on buildout.cfg was done.
recipe = plone.recipe.zeoserver[zrs]