cannot install postgis30 / rhel7

$ sudo http_proxy=http://localhost:8888 yum -y install -- postgis30_11{,-client}
...
Resolving Dependencies
--> Running transaction check
---> Package postgis30_11.x86_64 0:3.0.0alpha4-2.rhel7 will be installed
--> Processing Dependency: proj61 for package: postgis30_11-3.0.0alpha4-2.rhel7.x86_64
--> Processing Dependency: libproj.so.15()(64bit) for package: postgis30_11-3.0.0alpha4-2.rhel7.x86_64
---> Package postgis30_11-client.x86_64 0:3.0.0alpha4-2.rhel7 will be installed
--> Running transaction check
---> Package proj61.x86_64 0:6.1.0-1.rhel7 will be installed
--> Processing Dependency: sqlite-libs >= 3.7 for package: proj61-6.1.0-1.rhel7.x86_64
--> Finished Dependency Resolution
Error: Package: proj61-6.1.0-1.rhel7.x86_64 (pgdg10)
           Requires: sqlite-libs >= 3.7
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

It seems to me the build machines should verify ability install the packages,
perhaps in a chroot or similar.

Justin