Cannot view 1.20.6 mappings

[Anonymous941]

When trying to view 1.20.6 mappings, I get an error when running gradle yarn:

Calculating task graph as no cached configuration is available for tasks: yarn

FAILURE: Build failed with an exception.

* What went wrong:
Configuration cache state could not be cached: field `__classpath__` of task `:mapIntermediaryJar` of type `net.fabricmc.filament.task.MapJarTask`: error writing value of type 'org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection'
> Could not resolve all files for configuration ':minecraftLibraries'.
   > Could not find lwjgl-freetype-3.3.3-natives-macos-patch.jar (org.lwjgl:lwjgl-freetype:3.3.3).
     Searched in the following locations:
         https://repo.maven.apache.org/maven2/org/lwjgl/lwjgl-freetype/3.3.3/lwjgl-freetype-3.3.3-natives-macos-patch.jar

* 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 3s
4 actionable tasks: 4 executed
Configuration cache entry discarded due to serialization error.

This error is the same as SpongePowered/VanillaGradle#149, but it doesn't seem to be fixed with yarn

[Anonymous941]

After driving myself nuts for hours, the fix is extremely simple: move the Mojang repo to the top

diff --git a/build.gradle b/build.gradle
index 8097a0f63..1403e8481 100644
--- a/build.gradle
+++ b/build.gradle
@@ -41,15 +41,15 @@ if (ENV.BRANCH_NAME) {
 }
 
 repositories {
+       maven {
+               name "Mojang"
+               url 'https://libraries.minecraft.net/'
+       }
        mavenCentral()
        maven {
                name "Fabric Repository"
                url 'https://maven.fabricmc.net'
        }
-       maven {
-               name "Mojang"
-               url 'https://libraries.minecraft.net/'
-       }
        mavenLocal()
 }