/usr/local/bin/python -> /usr/bin/env python
diff --git a/Demo/sgi/gl/backface.py b/Demo/sgi/gl/backface.py
index 39929be..41c69d6 100755
--- a/Demo/sgi/gl/backface.py
+++ b/Demo/sgi/gl/backface.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# backface
#
diff --git a/Demo/sgi/gl/glinfo.py b/Demo/sgi/gl/glinfo.py
index 2b6c356..dae99f1 100755
--- a/Demo/sgi/gl/glinfo.py
+++ b/Demo/sgi/gl/glinfo.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# Print the values of all values that can be inquired with getgdesc().
# See man getgdesc() for a description.
diff --git a/Demo/sgi/gl/kites.py b/Demo/sgi/gl/kites.py
index 6e3dea6..be56513 100755
--- a/Demo/sgi/gl/kites.py
+++ b/Demo/sgi/gl/kites.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# *** This only works correctly on a 24 bit-plane machine. ***
#
diff --git a/Demo/sgi/gl/kunst.py b/Demo/sgi/gl/kunst.py
index 2055e52..6d9e04d 100755
--- a/Demo/sgi/gl/kunst.py
+++ b/Demo/sgi/gl/kunst.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# Simulate the artwork in the hall.
# Jack Jansen, Feb 91.
diff --git a/Demo/sgi/gl/mclock.py b/Demo/sgi/gl/mclock.py
index ec39de9..b1dfa1b 100755
--- a/Demo/sgi/gl/mclock.py
+++ b/Demo/sgi/gl/mclock.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# "M Clock"
#
diff --git a/Demo/sgi/gl/mixing.py b/Demo/sgi/gl/mixing.py
index 57dea9c..9a4c9c1 100755
--- a/Demo/sgi/gl/mixing.py
+++ b/Demo/sgi/gl/mixing.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# Use Gouraud shading to mix colors. Requires Z-buffer.
# It changes the color assignments so fast that you see white.
diff --git a/Demo/sgi/gl/nurbs.py b/Demo/sgi/gl/nurbs.py
index af2039b..c33cb4e 100755
--- a/Demo/sgi/gl/nurbs.py
+++ b/Demo/sgi/gl/nurbs.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# Rotate a 3D surface created using NURBS.
#
diff --git a/Demo/sgi/gl/zrgb.py b/Demo/sgi/gl/zrgb.py
index 6561e11..2ad68c9 100755
--- a/Demo/sgi/gl/zrgb.py
+++ b/Demo/sgi/gl/zrgb.py
@@ -1,4 +1,4 @@
-#! /usr/local/bin/python
+#! /usr/bin/env python
# zrgb (Requires Z buffer.)
#