diff --git a/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java b/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java
index 5201a16..496b312 100644
--- a/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java
+++ b/src/main/java/net/fabricmc/loom/configuration/providers/minecraft/mapped/ProcessedNamedMinecraftProvider.java
@@ -76,6 +76,7 @@ public abstract class ProcessedNamedMinecraftProvider<M extends MinecraftProvide
 
 			for (Path inputJar : inputJars) {
 				final Path outputJar = getProcessedPath(inputJar);
+				deleteSimilarJars(outputJar);
 
 				Files.copy(inputJar, outputJar, StandardCopyOption.REPLACE_EXISTING);
 				jarProcessorManager.process(outputJar.toFile());
@@ -87,6 +88,15 @@ public abstract class ProcessedNamedMinecraftProvider<M extends MinecraftProvide
 		}
 	}
 
+	private void deleteSimilarJars(Path jar) throws IOException {
+		Files.deleteIfExists(jar);
+
+		for (Path path : Files.list(jar.getParent()).filter(Files::isRegularFile)
+				.filter(path -> path.getFileName().startsWith(jar.getFileName().toString().replace(".jar", ""))).toList()) {
+			Files.deleteIfExists(path);
+		}
+	}
+
 	@Override
 	protected String getName(String name) {
 		return "%s%s-%s".formatted(projectMappedName, name, getTargetNamespace().toString());