diff --git a/src/TulsiGenerator/Bazel/tulsi/tulsi_aspects.bzl b/src/TulsiGenerator/Bazel/tulsi/tulsi_aspects.bzl
index 1d0591e..3f0a074 100644
--- a/src/TulsiGenerator/Bazel/tulsi/tulsi_aspects.bzl
+++ b/src/TulsiGenerator/Bazel/tulsi/tulsi_aspects.bzl
@@ -480,13 +480,7 @@
   """Returns a depset of Swift modules found on the given target."""
   swift_modules = depset()
   for modules in _getattr_as_list(target, 'swift.transitive_modules'):
-    if type(modules) == 'depset':
-      swift_modules += modules
-    else:
-      # TODO(b/37660812): Older version of swift_library used lists for
-      # transitive modules. This branch is here for backwards compatibility.
-      swift_modules += [modules]
-
+    swift_modules += modules
   return swift_modules
 
 
diff --git a/src/TulsiGenerator/BazelAspectInfoExtractor.swift b/src/TulsiGenerator/BazelAspectInfoExtractor.swift
index 088f81e..dd1d7e6 100644
--- a/src/TulsiGenerator/BazelAspectInfoExtractor.swift
+++ b/src/TulsiGenerator/BazelAspectInfoExtractor.swift
@@ -156,9 +156,6 @@
         "/\(aspectFileWorkspaceRelativePath)%\(aspect)",
         "--output_groups=tulsi-info,-_,-default",  // Build only the aspect artifacts.
         "--experimental_show_artifacts",  // Print the artifacts generated by the aspect.
-        // TODO(b/37660812): This switch applies only to the newer versions of swift_library and
-        // allows for backwards compatibility.
-        "--define=tulsi.swift_library.output_depsets=true",
     ])
     arguments.append(contentsOf: buildOptions)
     arguments.append(contentsOf: targets)