Gradle can't find project fabric-loom-0.8_SNAPSHOT

General Discussion
1

When i try to build i get this error:
Plugin [id: 'fabric-loom', version: '0.7-SNAPSHOT'] was not found in any of the following sources:

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    This is my build.gradle:

       plugins {
      id 'fabric-loom' version '0.7-SNAPSHOT'
      id 'maven-publish'
  }

  sourceCompatibility = JavaVersion.VERSION_1_8
  targetCompatibility = JavaVersion.VERSION_1_8

  archivesBaseName = project.archives_base_name
  version = project.mod_version
  group = project.maven_group

  dependencies {
      //to change the versions see the gradle.properties file
      minecraft "com.mojang:minecraft:${project.minecraft_version}"
      mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
      modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"

      // Fabric API. This is technically optional, but you probably want it anyway.
      modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
      compile 'com.mojang:brigadier:(1.0.17)'
      // PSA: Some older mods, compiled on Loom 0.2.1, might have outdated Maven POMs.
      // You may need to force-disable transitiveness on them.
  }



  processResources {
      inputs.property "version", project.version

      from(sourceSets.main.resources.srcDirs) {
          include "fabric.mod.json"
          expand "version": project.version
      }

      from(sourceSets.main.resources.srcDirs) {
          exclude "fabric.mod.json"
      }
  }

  // ensure that the encoding is set to UTF-8, no matter what the system default is
  // this fixes some edge cases with special characters not displaying correctly
  // see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
  tasks.withType(JavaCompile) {
      options.encoding = "UTF-8"
  }

  // Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
  // if it is present.
  // If you remove this task, sources will not be generated.
  task sourcesJar(type: Jar, dependsOn: classes) {
      classifier = "sources"
      from sourceSets.main.allSource
  }

  jar {
      from "LICENSE"
  }

  // configure the maven publication
  publishing {
      publications {
          mavenJava(MavenPublication) {
              // add all the jars that should be included when publishing to maven
              artifact(remapJar) {
                  builtBy remapJar
              }
              artifact(sourcesJar) {
                  builtBy remapSourcesJar
              }
          }
      }

      // select the repositories you want to publish to
      repositories {
          // uncomment to publish to the local maven
          // mavenLocal()
      }
  }
2

This is the Sponge forums, not the fabric forums, you may get better help from the fabric community.

But from what I can gather loom requires you to provide the repo in the repositories as its not in your local maven collection