diff --git a/src/main/java/net/fabricmc/loom/util/FileSystemUtil.java b/src/main/java/net/fabricmc/loom/util/FileSystemUtil.java
index d0f5f154..a031ffa0 100644
--- a/src/main/java/net/fabricmc/loom/util/FileSystemUtil.java
+++ b/src/main/java/net/fabricmc/loom/util/FileSystemUtil.java
@@ -72,15 +72,15 @@ public final class FileSystemUtil {
 	}
 
 	public static Delegate getJarFileSystem(File file, boolean create) throws IOException {
-		return getJarFileSystem(file.toURI(), create);
+		return new Delegate(FileSystemReference.openJar(file.toPath(), create));
 	}
 
 	public static Delegate getJarFileSystem(Path path, boolean create) throws IOException {
-		return getJarFileSystem(path.toUri(), create);
+		return new Delegate(FileSystemReference.openJar(path, create));
 	}
 
 	public static Delegate getJarFileSystem(Path path) throws IOException {
-		return getJarFileSystem(path, false);
+		return new Delegate(FileSystemReference.openJar(path));
 	}
 
 	public static Delegate getJarFileSystem(URI uri, boolean create) throws IOException {
diff --git a/src/main/java/net/fabricmc/loom/util/ModUtils.java b/src/main/java/net/fabricmc/loom/util/ModUtils.java
index e5896a45..31298d95 100644
--- a/src/main/java/net/fabricmc/loom/util/ModUtils.java
+++ b/src/main/java/net/fabricmc/loom/util/ModUtils.java
@@ -47,7 +47,7 @@ public final class ModUtils {
 	@Nullable
 	public static JsonObject getFabricModJson(Path path) {
 		try {
-			return ZipUtils.unpackGson(path, "fabric.mod.json", JsonObject.class);
+			return ZipUtils.unpackGsonNullable(path, "fabric.mod.json", JsonObject.class);
 		} catch (IOException e) {
 			throw new UncheckedIOException("Failed to extract fabric.mod.json from " + path, e);
 		}
diff --git a/src/main/java/net/fabricmc/loom/util/ZipUtils.java b/src/main/java/net/fabricmc/loom/util/ZipUtils.java
index 4428ef92..f6214aed 100644
--- a/src/main/java/net/fabricmc/loom/util/ZipUtils.java
+++ b/src/main/java/net/fabricmc/loom/util/ZipUtils.java
@@ -112,6 +112,15 @@ public class ZipUtils {
 		return LoomGradlePlugin.GSON.fromJson(new String(bytes, StandardCharsets.UTF_8), clazz);
 	}
 
+	@Nullable
+	public static <T> T unpackGsonNullable(Path zip, String path, Class<T> clazz) throws IOException {
+		try {
+			return unpackGson(zip, path, clazz);
+		} catch (NoSuchFileException e) {
+			return null;
+		}
+	}
+
 	public static <T> T unpackJackson(Path zip, String path, Class<T> clazz) throws IOException {
 		final byte[] bytes = unpack(zip, path);
 		return LoomGradlePlugin.OBJECT_MAPPER.readValue(new String(bytes, StandardCharsets.UTF_8), clazz);