diff --git a/lib/bundler/lazy_specification.rb b/lib/bundler/lazy_specification.rb
index 21e75d2126..ff9444e009 100644
--- a/lib/bundler/lazy_specification.rb
+++ b/lib/bundler/lazy_specification.rb
@@ -76,6 +76,8 @@ module Bundler
     end
 
     def materialize_for_installation
+      source.local!
+
       __materialize__(ruby_platform_materializes_to_ruby_platform? ? platform : Bundler.local_platform)
     end
 
diff --git a/lib/bundler/spec_set.rb b/lib/bundler/spec_set.rb
index a7a95e49bc..4e339ffe91 100644
--- a/lib/bundler/spec_set.rb
+++ b/lib/bundler/spec_set.rb
@@ -70,7 +70,6 @@ module Bundler
 
       materialized.map! do |s|
         next s unless s.is_a?(LazySpecification)
-        s.source.local!
         s.materialize_for_installation || s
       end
       SpecSet.new(materialized)
@@ -82,7 +81,6 @@ module Bundler
     def materialized_for_all_platforms
       @specs.map do |s|
         next s unless s.is_a?(LazySpecification)
-        s.source.local!
         s.source.remote!
         spec = s.materialize_for_installation
         raise GemNotFound, "Could not find #{s.full_name} in any of the sources" unless spec