I:\Railcraft-liach-1.12.2>gradlew.bat build

FAILURE: Build failed with an exception.

* Where:
Build file 'I:\Railcraft-liach-1.12.2\version\build.gradle' line: 6

* What went wrong:
A problem occurred evaluating project ':version'.
> Cannot get property 'version_minecraft' on extra properties extension as it do
es not exist

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1s

I:\Railcraft-liach-1.12.2>