Gradle doesn't use repositories from "allprojects" - gradle

Question

If I comment "repositories" on my buildscript, I get an error - even though the repositories are already declared on my "allprojects".
allprojects {
//...
buildscript {
repositories {
maven {
url "http://www.exemple.com/repositories"
}
}
}
}
}
buildscript {
// repositories {
// maven {
// url "http://www.exemple.com/repositories"
// }
// }
dependencies {
classpath group: 'com.exemple', name: 'exemple', version: '1.2.3'
}
}
Why does gradle not use the repositories defined on allprojects ? The error that I get:
> Could not resolve all dependencies for configuration ':classpath'.
> Cannot resolve external dependency com.exemple:exemple:1.2.3 because no repositories are defined.

Answer 1

buildscript block refers to the classpath for the current script, not a project. You can use it only for a Gradle script. For example:
example.gradle
buildscript {
repositories {
maven {
url "http://www.example.com/repositories"
}
}
dependencies {
classpath group: 'com.example', name: 'example', version: '1.2.3'
}
}
}
}
// do something, add tasks, etc.
build.gradle
subprojects {
apply from: 'example.gradle'
}