working 1.20.6

platforms/bukkit/nms/v1_21/build.gradle.kts

@@ -1,9 +1,5 @@
 apply(plugin = "io.papermc.paperweight.userdev")
 
-repositories {
-    maven("https://s01.oss.sonatype.org/content/repositories/snapshots/")
-}
-
 dependencies {
     api(project(":platforms:bukkit:common"))
     paperDevBundle(Versions.Bukkit.paperDevBundle)

platforms/bukkit/nms/v1_21/src/main/java/com/dfsek/terra/bukkit/nms/v1_21/AwfulBukkitHacks.java

@@ -10,6 +10,7 @@ import net.minecraft.core.registries.Registries;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.tags.TagKey;
+import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.biome.Biome;
 import org.bukkit.NamespacedKey;
 import org.slf4j.Logger;