diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index 96a0091081aed6..0b8c7c3841847d 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -45,6 +45,8 @@ def freeze
 
   def add(spec)
     case dep = fetch(spec)
+    when Array
+      dep.compact.each { |dep| @deps << dep }
     when Dependency
       @deps << dep
     when Requirement
@@ -63,11 +65,14 @@ def fetch(spec)
   end
 
   def cache_key(spec)
-    if spec.is_a?(Resource) && spec.download_strategy <= CurlDownloadStrategy
-      File.extname(spec.url)
-    else
-      spec
+    if spec.is_a?(Resource)
+      if spec.download_strategy <= CurlDownloadStrategy
+        return "#{spec.download_strategy}#{File.extname(spec.url).split("?").first}"
+      else
+        return spec.download_strategy
+      end
     end
+    spec
   end
 
   def build(spec)
@@ -128,7 +133,7 @@ def init_global_dep_tree_if_needed!; end
 
   sig {
     params(spec: T.any(String, Resource, Symbol, Requirement, Dependency, Class),
-           tags: T::Array[Symbol]).returns(T.any(Dependency, Requirement, NilClass))
+           tags: T::Array[Symbol]).returns(T.any(Dependency, Requirement, Array, NilClass))
   }
   def parse_spec(spec, tags)
     raise ArgumentError, "Implicit dependencies cannot be manually specified" if tags.include?(:implicit)
@@ -177,8 +182,7 @@ def resource_dep(spec, tags)
     strategy = spec.download_strategy
 
     if strategy <= HomebrewCurlDownloadStrategy
-      @deps << curl_dep_if_needed(tags)
-      parse_url_spec(spec.url, tags)
+      [curl_dep_if_needed(tags), parse_url_spec(spec.url, tags)]
     elsif strategy <= NoUnzipCurlDownloadStrategy
       # ensure NoUnzip never adds any dependencies
     elsif strategy <= CurlDownloadStrategy