Description: fdfind -e py -x sed -i -e 's@/usr/bin/env python@/usr/bin/python3@'
diff --git a/build/flatten-headers.py b/build/flatten-headers.py
index 563725a..80de552 100755
--- a/build/flatten-headers.py
+++ b/build/flatten-headers.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 #
 #  BLIS    
 #  An object-based framework for developing high-performance BLAS-like
diff --git a/netlib-test/lapack-3.4.2/lapack_testing.py b/netlib-test/lapack-3.4.2/lapack_testing.py
index 3bd9462..526a728 100755
--- a/netlib-test/lapack-3.4.2/lapack_testing.py
+++ b/netlib-test/lapack-3.4.2/lapack_testing.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python3
 # -*- coding: utf-8 -*-
 
 
diff --git a/windows/build/gather-src-for-windows.py b/windows/build/gather-src-for-windows.py
index 0153850..ce910b9 100755
--- a/windows/build/gather-src-for-windows.py
+++ b/windows/build/gather-src-for-windows.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python3
 
 # ------------------------------------------------------------------------------
 
diff --git a/windows/build/gen-check-rev-file.py b/windows/build/gen-check-rev-file.py
index f096da8..5ea7cd7 100755
--- a/windows/build/gen-check-rev-file.py
+++ b/windows/build/gen-check-rev-file.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python3
 
 # ------------------------------------------------------------------------------
 
diff --git a/windows/build/gen-config-file.py b/windows/build/gen-config-file.py
index 7149059..d307ca8 100755
--- a/windows/build/gen-config-file.py
+++ b/windows/build/gen-config-file.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/python3
 
 # ------------------------------------------------------------------------------