Unable to build Kotlin project configuration

[AKA-Syenite]

Warning:<i><b>root project 'Questlog': Unable to build Kotlin project configuration</b>
Details: java.lang.reflect.InvocationTargetException: null
Caused by: org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':apiCompileClasspath'.
Caused by: org.gradle.internal.resolve.ModuleVersionNotFoundException: Could not find net.shadowfacts:Forgelin:1.5.1.
Required by:
    com.shukaro.questlog:Questlog:1.0</i>

build.gradle

buildscript {
    ext.kotlin_version = "1.1.4-3"
    repositories {
        jcenter()
        maven { url = "http://files.minecraftforge.net/maven" }
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'net.minecraftforge.gradle:ForgeGradle:2.3-SNAPSHOT'
    }
}
apply plugin: 'net.minecraftforge.gradle.forge'
apply plugin: 'kotlin'
//Only edit below this line, the above code adds and enables the necessary things for Forge to be setup.

version = "1.0"
group = "com.shukaro.questlog" // http://maven.apache.org/guides/mini/guide-naming-conventions.html
archivesBaseName = "questlog"

sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8

minecraft {
    version = "1.12.1-14.22.0.2475"
    runDir = "run"

    // the mappings can be changed at any time, and must be in the following format.
    // snapshot_YYYYMMDD   snapshot are built nightly.
    // stable_#            stables are built at the discretion of the MCP team.
    // Use non-default mappings at your own risk. they may not always work.
    // simply re-run your setup task after changing the mappings to update your workspace.
    mappings = "snapshot_20170624"
    // makeObfSourceJar = false // an Srg named sources jar is made by default. uncomment this to disable.
}

dependencies {
    // you may put jars on which you depend on in ./libs
    // or you may define them like so..
    //compile "some.group:artifact:version:classifier"
    //compile "some.group:artifact:version"

    // real examples
    //compile 'com.mod-buildcraft:buildcraft:6.0.8:dev'  // adds buildcraft to the dev env
    //compile 'com.googlecode.efficient-java-matrix-library:ejml:0.24' // adds ejml to the dev env

    // the 'provided' configuration is for optional dependencies that exist at compile-time but might not at runtime.
    //provided 'com.mod-buildcraft:buildcraft:6.0.8:dev'

    // the deobf configurations:  'deobfCompile' and 'deobfProvided' are the same as the normal compile and provided,
    // except that these dependencies get remapped to your current MCP mappings
    //deobfCompile 'com.mod-buildcraft:buildcraft:6.0.8:dev'
    //deobfProvided 'com.mod-buildcraft:buildcraft:6.0.8:dev'

    // for more info...
    // http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
    // http://www.gradle.org/docs/current/userguide/dependency_management.html

    compile group: "net.shadowfacts", name: "Forgelin", version: "1.5.1"
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
}

processResources {
    // this will ensure that this task is redone when the versions change.
    inputs.property "version", project.version
    inputs.property "mcversion", project.minecraft.version

    // replace stuff in mcmod.info, nothing else
    from(sourceSets.main.resources.srcDirs) {
        include 'mcmod.info'

        // replace version and mcversion
        expand 'version':project.version, 'mcversion':project.minecraft.version
    }

    // copy everything else except the mcmod.info
    from(sourceSets.main.resources.srcDirs) {
        exclude 'mcmod.info'
    }
}

[shadowfacts]

You need to add the Maven repository.