diff --git a/repository/Ruby-Core.package/Ruby.class/class/evaluateExpression.in.to..st b/repository/Ruby-Core.package/Ruby.class/class/evaluateExpression.in.to..st
index b7a64d96..a8bc710d 100644
--- a/repository/Ruby-Core.package/Ruby.class/class/evaluateExpression.in.to..st
+++ b/repository/Ruby-Core.package/Ruby.class/class/evaluateExpression.in.to..st
@@ -1,7 +1,3 @@
 execution
 evaluateExpression: aSelection in: aContext to: receiver
-	| rbCode rbBinding |
-	rbCode := aSelection asString copyReplaceAll: 'self' with: 'that'.
-	rbBinding := Ruby eval: 'blank_binding'.
-	rbBinding local_variable_set: 'that' to: receiver.
-	^ rbBinding eval: rbCode
\ No newline at end of file
+	^ receiver instance_eval: aSelection asString
\ No newline at end of file
diff --git a/repository/Ruby-Core.package/Ruby.class/class/startUp..st b/repository/Ruby-Core.package/Ruby.class/class/startUp..st
deleted file mode 100644
index d18e5006..00000000
--- a/repository/Ruby-Core.package/Ruby.class/class/startUp..st
+++ /dev/null
@@ -1,4 +0,0 @@
-overrides
-startUp: resuming
-	(resuming and: [ self vmSpeaksLanguage ])
-		ifTrue: [ Ruby eval: 'def blank_binding; binding; end' ]
\ No newline at end of file
diff --git a/repository/Ruby-Core.package/Ruby.class/methodProperties.json b/repository/Ruby-Core.package/Ruby.class/methodProperties.json
index 1eef3695..6252688d 100644
--- a/repository/Ruby-Core.package/Ruby.class/methodProperties.json
+++ b/repository/Ruby-Core.package/Ruby.class/methodProperties.json
@@ -7,7 +7,7 @@
 		"eval:filePath:breakOnExceptions:" : "fn 3/23/2017 08:59",
 		"evaluateExpression:" : "fn 3/27/2017 23:53",
 		"evaluateExpression:breakOnExceptions:" : "fn 3/27/2017 23:53",
-		"evaluateExpression:in:to:" : "fn 11/13/2017 14:26",
+		"evaluateExpression:in:to:" : "fn 11/14/2017 17:06",
 		"fileExtension" : "fn 3/17/2017 10:20",
 		"getFilename:" : "fn 4/2/2017 19:33",
 		"getSource:" : "fn 3/27/2017 23:54",
@@ -23,7 +23,6 @@
 		"pygmentsLexer" : "fn 5/16/2017 17:48",
 		"restartFrame:with:" : "fn 3/16/2017 22:22",
 		"sourceCodeTemplate" : "fn 3/14/2017 11:22",
-		"startUp:" : "fn 11/13/2017 14:29",
 		"tempNamesIn:" : "fn 3/16/2017 22:45",
 		"tempVariableAt:in:" : "fn 3/16/2017 22:44",
 		"vmSpeaksLanguage" : "fn 3/14/2017 11:33" },
diff --git a/repository/Ruby-Core.package/monticello.meta/version b/repository/Ruby-Core.package/monticello.meta/version
index 0c1a801d..6cdb9403 100644
--- a/repository/Ruby-Core.package/monticello.meta/version
+++ b/repository/Ruby-Core.package/monticello.meta/version
@@ -1 +1 @@
-(name 'Ruby-Core-fn.9' message 'Add Ruby class>>primBreakOnExceptionsDuringSends:' id 'a3dd00e0-2f31-4398-9f3b-778541a9ea60' date '14 November 2017' time '10:01:04.784037 am' author 'fn' ancestors ((name 'Ruby-Core-fn.8' message 'Add support for Ruby Bindings.' id 'bb1f89c6-a47b-4123-b5dd-8549b170736f' date '13 November 2017' time '3:18:05.11033 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.7' message 'Cleanups' id '0d0a21be-1f5d-4c8a-a41d-540112bd0e3b' date '23 May 2017' time '4:40:47.799452 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.6' message 'Introduce RubyProcess class' id '6e29ec50-ce7a-42ad-9912-ec799a11c3b3' date '6 May 2017' time '8:42:11.610918 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.5' message 'Updates' id '405326bf-5725-48cf-8895-d51382c8cb38' date '28 April 2017' time '4:44:08.446987 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.4' message 'Update in-image code' id '132afc61-6eed-4cbc-97ae-952bbd94abcf' date '31 March 2017' time '12:39:12.106118 am' author 'fn' ancestors ((name 'Ruby-Core-fn.3' message 'Update in-image code' id '0c2297bb-784e-4022-a5d7-0b9c0d54bb7f' date '22 March 2017' time '9:44:58.947694 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.2' message 'Improve Ruby integration' id '7a70298b-51b4-4e22-baa7-0caf3578d63b' date '15 March 2017' time '10:23:26.351199 am' author 'fn' ancestors ((name 'Ruby-Core-fn.1' message 'Introduce Ruby and RubyObject classes' id '8afbeb30-0e54-4ea1-8841-350120813f0d' date '14 March 2017' time '10:53:52.189423 am' author 'fn' ancestors () stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())
\ No newline at end of file
+(name 'Ruby-Core-fn.10' message 'Use instance_eval instead of binding magic' id '5549780c-b724-4761-855e-789fa3fbcb69' date '14 November 2017' time '5:07:40.370652 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.9' message 'Add Ruby class>>primBreakOnExceptionsDuringSends:' id 'a3dd00e0-2f31-4398-9f3b-778541a9ea60' date '14 November 2017' time '10:01:04.784037 am' author 'fn' ancestors ((name 'Ruby-Core-fn.8' message 'Add support for Ruby Bindings.' id 'bb1f89c6-a47b-4123-b5dd-8549b170736f' date '13 November 2017' time '3:18:05.11033 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.7' message 'Cleanups' id '0d0a21be-1f5d-4c8a-a41d-540112bd0e3b' date '23 May 2017' time '4:40:47.799452 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.6' message 'Introduce RubyProcess class' id '6e29ec50-ce7a-42ad-9912-ec799a11c3b3' date '6 May 2017' time '8:42:11.610918 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.5' message 'Updates' id '405326bf-5725-48cf-8895-d51382c8cb38' date '28 April 2017' time '4:44:08.446987 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.4' message 'Update in-image code' id '132afc61-6eed-4cbc-97ae-952bbd94abcf' date '31 March 2017' time '12:39:12.106118 am' author 'fn' ancestors ((name 'Ruby-Core-fn.3' message 'Update in-image code' id '0c2297bb-784e-4022-a5d7-0b9c0d54bb7f' date '22 March 2017' time '9:44:58.947694 pm' author 'fn' ancestors ((name 'Ruby-Core-fn.2' message 'Improve Ruby integration' id '7a70298b-51b4-4e22-baa7-0caf3578d63b' date '15 March 2017' time '10:23:26.351199 am' author 'fn' ancestors ((name 'Ruby-Core-fn.1' message 'Introduce Ruby and RubyObject classes' id '8afbeb30-0e54-4ea1-8841-350120813f0d' date '14 March 2017' time '10:53:52.189423 am' author 'fn' ancestors () stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())) stepChildren ())
\ No newline at end of file