diff --git a/source/BaselineOfBuoy/BaselineOfBuoy.class.st b/source/BaselineOfBuoy/BaselineOfBuoy.class.st
index d8b0788..ec7394d 100644
--- a/source/BaselineOfBuoy/BaselineOfBuoy.class.st
+++ b/source/BaselineOfBuoy/BaselineOfBuoy.class.st
@@ -58,8 +58,12 @@ BaselineOfBuoy >> baselineCollections: spec [
 		package: 'Buoy-Collections-Extensions'
 		with: [ spec requires: 'Buoy-Collections' ];
 		group: 'Deployment' with: 'Buoy-Collections-Extensions';
+		package: 'Buoy-Collections-Pharo-Extensions'
+		with: [ spec requires: 'Buoy-Collections' ];
+		group: 'Deployment' with: 'Buoy-Collections-Pharo-Extensions';
 		package: 'Buoy-Collections-Tests' with: [
 			spec requires: #( 'Buoy-Collections' 'Buoy-Collections-Extensions'
+					   'Buoy-Collections-Pharo-Extensions'
 					   'Dependent-SUnit-Extensions' ) ];
 		group: 'Tests' with: 'Buoy-Collections-Tests'
 ]
diff --git a/source/Buoy-Collections-Extensions/SequenceableCollection.extension.st b/source/Buoy-Collections-Extensions/SequenceableCollection.extension.st
index 67a34ac..77c3880 100644
--- a/source/Buoy-Collections-Extensions/SequenceableCollection.extension.st
+++ b/source/Buoy-Collections-Extensions/SequenceableCollection.extension.st
@@ -6,12 +6,6 @@ SequenceableCollection >> copyFirst: n [
 	^ [ self copyFrom: 1 to: n ] unless: n = 0 inWhichCase: [ self species new ]
 ]
 
-{ #category : #'*Buoy-Collections-Extensions' }
-SequenceableCollection >> copyLast: n [
-
-	^ [ self copyFrom: self size - n + 1 to: self size ] unless: n = 0 inWhichCase: [ self species new ]
-]
-
 { #category : #'*Buoy-Collections-Extensions' }
 SequenceableCollection >> copyNoMoreThanFirst: n [
 
diff --git a/source/Buoy-Collections-Pharo-Extensions/SequenceableCollection.extension.st b/source/Buoy-Collections-Pharo-Extensions/SequenceableCollection.extension.st
new file mode 100644
index 0000000..9c8bf53
--- /dev/null
+++ b/source/Buoy-Collections-Pharo-Extensions/SequenceableCollection.extension.st
@@ -0,0 +1,7 @@
+Extension { #name : #SequenceableCollection }
+
+{ #category : #'*Buoy-Collections-Pharo-Extensions' }
+SequenceableCollection >> copyLast: n [
+
+	^ [ self copyFrom: self size - n + 1 to: self size ] unless: n = 0 inWhichCase: [ self species new ]
+]
diff --git a/source/Buoy-Collections-Pharo-Extensions/package.st b/source/Buoy-Collections-Pharo-Extensions/package.st
new file mode 100644
index 0000000..754df3d
--- /dev/null
+++ b/source/Buoy-Collections-Pharo-Extensions/package.st
@@ -0,0 +1 @@
+Package { #name : #'Buoy-Collections-Pharo-Extensions' }