Modified a number of scripts using "/bin/env" to make it
"/usr/bin/env", since the "/bin" location does not exist on some
versions of Linux.
diff --git a/sky130/custom/scripts/fixspice.py b/sky130/custom/scripts/fixspice.py
index f1ff86f..a44cde8 100755
--- a/sky130/custom/scripts/fixspice.py
+++ b/sky130/custom/scripts/fixspice.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # fixspice ---
 #
diff --git a/sky130/custom/scripts/inc_verilog.py b/sky130/custom/scripts/inc_verilog.py
index 2bcd0a3..aebce3e 100755
--- a/sky130/custom/scripts/inc_verilog.py
+++ b/sky130/custom/scripts/inc_verilog.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # inc_verilog ---
 #
diff --git a/sky130/custom/scripts/rename_cells.py b/sky130/custom/scripts/rename_cells.py
index 1daa8ea..8057ad3 100755
--- a/sky130/custom/scripts/rename_cells.py
+++ b/sky130/custom/scripts/rename_cells.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # rename_cells ---
 #
diff --git a/sky130/custom/scripts/rename_models.py b/sky130/custom/scripts/rename_models.py
index 1be4c2b..1eea3dc 100755
--- a/sky130/custom/scripts/rename_models.py
+++ b/sky130/custom/scripts/rename_models.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # rename_models ---
 #