diff --git a/lib/parity/backup.rb b/lib/parity/backup.rb
index 853f594..423800a 100644
--- a/lib/parity/backup.rb
+++ b/lib/parity/backup.rb
@@ -72,7 +72,7 @@ def download_remote_backup
     def restore_from_local_temp_backup
       Kernel.system(
         "pg_restore tmp/latest.backup --verbose --clean --no-acl --no-owner "\
-          "--dbname #{development_db} --jobs #{Etc.nprocessors} "\
+          "--dbname #{development_db} --jobs #{processor_cores} "\
           "#{additional_args}",
       )
     end
@@ -106,5 +106,17 @@ def development_db
     def database_yaml_file
       IO.read(DATABASE_YML_RELATIVE_PATH)
     end
+
+    def processor_cores
+      if ruby_version_over_2_2?
+        Etc.nprocessors
+      else
+        2
+      end
+    end
+
+    def ruby_version_over_2_2?
+      Etc.respond_to?(:nprocessors)
+    end
   end
 end
diff --git a/spec/parity/backup_spec.rb b/spec/parity/backup_spec.rb
index 0939d48..cb1724e 100644
--- a/spec/parity/backup_spec.rb
+++ b/spec/parity/backup_spec.rb
@@ -25,6 +25,30 @@
       with(delete_local_temp_backup_command)
   end
 
+  it "restores backups to development with Rubies that do not support Etc.nprocessors" do
+    allow(IO).to receive(:read).and_return(database_fixture)
+    allow(Kernel).to receive(:system)
+    allow(Etc).to receive(:respond_to?).with(:nprocessors).and_return(false)
+
+    Parity::Backup.new(from: "production", to: "development").restore
+
+    expect(Kernel).
+      to have_received(:system).
+      with(make_temp_directory_command)
+    expect(Kernel).
+      to have_received(:system).
+      with(download_remote_database_command)
+    expect(Kernel).
+      to have_received(:system).
+      with(drop_development_database_drop_command)
+    expect(Kernel).
+      to have_received(:system).
+      with(restore_from_local_temp_backup_command(cores: 2))
+    expect(Kernel).
+      to have_received(:system).
+      with(delete_local_temp_backup_command)
+  end
+
   it "restores backups to staging from production" do
     stub_heroku_app_name
     allow(Kernel).to receive(:system)
@@ -101,9 +125,9 @@ def download_remote_database_command
     'curl -o tmp/latest.backup "$(heroku pg:backups:url --remote production)"'
   end
 
-  def restore_from_local_temp_backup_command
+  def restore_from_local_temp_backup_command(cores: number_of_processes)
     "pg_restore tmp/latest.backup --verbose --clean --no-acl --no-owner "\
-      "--dbname #{default_db_name} --jobs #{number_of_processes} "
+      "--dbname #{default_db_name} --jobs #{cores} "
   end
 
   def number_of_processes