gradle.properties fail reading property with dot notation

And another one:

println property('build.version')
println "Version: ${property('build.version')}"

or

println ext['build.version']
println "Version: ${ext['build.version']}"

See Properties and Extra Properties documentation.

Another way to get access to the properties is using syntax below

println "Version: ${project.'build.version'}"

You cannot use properties with a dot in this way because Groovy thinks it's a version property of the build instance. If you want a property to contain a dot then you should use it in the following way:

println rootProject.properties['build.version']