diff --git a/src/BaselineOfExtEnvi/BaselineOfExtEnvi.class.st b/src/BaselineOfExtEnvi/BaselineOfExtEnvi.class.st
index 7fab66b..ce537de 100644
--- a/src/BaselineOfExtEnvi/BaselineOfExtEnvi.class.st
+++ b/src/BaselineOfExtEnvi/BaselineOfExtEnvi.class.st
@@ -7,7 +7,5 @@ Class {
 { #category : #baseline }
 BaselineOfExtEnvi >> baseline: spec [
 	<baseline>
-	^ spec
-		for: #common
-		do: [ spec package: 'ExtEnvi' with: [ spec requires: #('GToolkit-Utility-System') ] ]
+	^ spec for: #common do: [ spec package: 'ExtEnvi' ]
 ]
diff --git a/src/ExtEnvi/PyEnv.class.st b/src/ExtEnvi/PyEnv.class.st
new file mode 100644
index 0000000..123f6db
--- /dev/null
+++ b/src/ExtEnvi/PyEnv.class.st
@@ -0,0 +1,41 @@
+Class {
+	#name : #PyEnv,
+	#superclass : #Object,
+	#instVars : [
+		'workingDirectory',
+		'pyVersion',
+		'pyBinLocation'
+	],
+	#category : #ExtEnvi
+}
+
+{ #category : #'as yet unclassified' }
+PyEnv >> initialize [
+	super initialize
+]
+
+{ #category : #'as yet unclassified' }
+PyEnv >> python3 [
+	pyVersion := (GtSubprocessWithInMemoryOutput new
+			command: 'python3';
+			arguments: #('--version');
+			runAndWait;
+			stdout) trimmed.
+	pyBinLocation := (GtSubprocessWithInMemoryOutput new
+			command: 'which';
+			arguments: #('python3');
+			runAndWait;
+			stdout) trimmed asFileReference.
+	^ {'location' -> pyBinLocation.
+		'version' -> pyVersion} asDictionary
+]
+
+{ #category : #accessing }
+PyEnv >> workingDirectory [
+	^ workingDirectory ifNil: [ workingDirectory := (FileLocator documents / 'TempPythonEnv') ensureCreateDirectory ]
+]
+
+{ #category : #accessing }
+PyEnv >> workingDirectory: aDirReference [
+	workingDirectory := aDirReference
+]