Build version on Couchbase console

I have downloaded the code for 4.5.1 released and build it.
When i run the Couchbase server and check the release and build number on
Couchbase console in about dialog ,it shows as 4.0.0-1946.
Can someone please suggest what needs to be done for getting the correct build and verison number of Couchbase console ?

If you look at the build scripts you’ll see that the version number is defined via the PRODUCT_VERSION CMake variable.

Sorry for the delay in reply.
I tried passing the PRODUCT_VERSION=4.5 in CMAKE , however still when i run the couchbase server, i see the version number as 4.0.
Is there any other file that needs modification?