doesn’t work: using gem sass-rails 5.0.6

The Gemfile created by the Rails 5.1.rc1 generator
referenced the GitHub master branch version of the gem.

Gemfile

@@ -13,7 +13,8 @@ gem 'sqlite3'
 # Use Puma as the app server
 gem 'puma', '~> 3.7'
 # Use SCSS for stylesheets
-gem 'sass-rails', github: "rails/sass-rails"
+# gem 'sass-rails', github: "rails/sass-rails"
+gem 'sass-rails', '~> 5.0.6'
 
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'

Gemfile.lock

@@ -1,13 +1,3 @@
-GIT
-  remote: https://github.com/rails/sass-rails.git
-  revision: dfbcc6a53653d8908007e26324a0f299f026ec4f
-  specs:
-    sass-rails (6.0.0.beta1)
-      railties (>= 4.0.0, < 5.1)
-      sass (~> 3.4)
-      sprockets (~> 4.x)
-      sprockets-rails (< 4.0)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -133,6 +123,12 @@ GEM
     ruby_dep (1.5.0)
     rubyzip (1.2.1)
     sass (3.4.23)
+    sass-rails (5.0.6)
+      railties (>= 4.0.0, < 6)
+      sass (~> 3.1)
+      sprockets (>= 2.8, < 4.0)
+      sprockets-rails (>= 2.0, < 4.0)
+      tilt (>= 1.1, < 3)
     selenium-webdriver (3.3.0)
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
@@ -152,6 +148,7 @@ GEM
     sqlite3 (1.3.13)
     thor (0.19.4)
     thread_safe (0.3.6)
+    tilt (2.0.5)
     turbolinks (5.0.1)
       turbolinks-source (~> 5)
     turbolinks-source (5.0.0)
@@ -182,7 +179,7 @@ DEPENDENCIES
   listen (>= 3.0.5, < 3.2)
   puma (~> 3.7)
   rails (~> 5.1.0.rc1)
-  sass-rails!
+  sass-rails (~> 5.0.6)
   selenium-webdriver
   spring
   spring-watcher-listen (~> 2.0.0)