Fix Sybil release paths

ios/fastlane/Fastfile

@@ -14,7 +14,8 @@ platform :ios do
     build_number = ENV.fetch("GITHUB_RUN_NUMBER")
     UI.user_error!("GITHUB_RUN_NUMBER must be a positive integer") unless build_number.match?(/\A[1-9]\d*\z/)
 
-    project_spec = "Apps/Sybil/project.yml"
+    ios_dir = File.expand_path("..", __dir__)
+    project_spec = File.join(ios_dir, "Apps/Sybil/project.yml")
     contents = File.read(project_spec)
     unless contents.match?(/^\s*MARKETING_VERSION:/) && contents.match?(/^\s*CURRENT_PROJECT_VERSION:/)
       UI.user_error!("Could not find version settings in #{project_spec}")
@@ -23,7 +24,7 @@ platform :ios do
     contents.sub!(/^(\s*CURRENT_PROJECT_VERSION:\s*).*/, "\\1#{build_number}")
     File.write(project_spec, contents)
 
-    sh("xcodegen")
+    sh("xcodegen", "--spec", File.join(ios_dir, "project.yml"))
 
     api_key = app_store_connect_api_key(
       key_id: ENV.fetch("ASC_KEY_ID"),
@@ -32,7 +33,10 @@ platform :ios do
       is_key_content_base64: true
     )
 
-    build_app(scheme: "Sybil")
+    build_app(
+      project: File.join(ios_dir, "Sybil.xcodeproj"),
+      scheme: "Sybil"
+    )
 
     upload_to_testflight(
       api_key: api_key,