JEI in development environment? 1.16.5 & 7.6.1.71

Trying to get my development environment up and running and I've ran into issues getting JEI into the game.

build.gradle below;

repositories {
    maven {
        // location of the maven that hosts JEI files
        name = "Progwml6 maven"
        url = "http://dvs1.progwml6.com/files/maven"
    }
    maven {
        // location of a maven mirror for JEI files, as a fallback
        name = "ModMaven"
        url = "modmaven.k-4u.nl"
    }
}

dependencies {
    // Specify the version of Minecraft to use, If this is any group other then 'net.minecraft' it is assumed
    // that the dep is a ForgeGradle 'patcher' dependency. And it's patches will be applied.
    // The userdev artifact is a special name and will get all sorts of transformations applied to it.
    minecraft 'net.minecraftforge:forge:1.16.5-36.0.22'

    // compile against the JEI API but do not include it at runtime
    compileOnly fg.deobf("mezz.jei:jei-1.16.4:7.6.1.71:api")
    // at runtime, use the full JEI jar
    runtimeOnly fg.deobf("mezz.jei:jei-1.16.4:7.6.1.71")
}

I switched from using ${jei_version} and ${mc_version} to hardcoded versions to see if that was the issue but nope, any help would be appreciated.