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/common/change_gds_date.py b/common/change_gds_date.py
index 0aa0056..7d6c5ae 100755
--- a/common/change_gds_date.py
+++ b/common/change_gds_date.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 # Script to read a GDS file, modify the timestamp(s), and rewrite the GDS file.
 
 import os

diff --git a/common/change_gds_string.py b/common/change_gds_string.py
index b8a0321..accbc50 100755
--- a/common/change_gds_string.py
+++ b/common/change_gds_string.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 # Script to read a GDS file, modify the given string, and rewrite the GDS file.
 # The string may be a substring;  the GDS file will be parsed completely for
 # library name, structure name, instance name, and other strings, and the

diff --git a/common/fix_subckt_params.py b/common/fix_subckt_params.py
index f986119..f961326 100755
--- a/common/fix_subckt_params.py
+++ b/common/fix_subckt_params.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # fix_subckt_params.py --
 #

diff --git a/common/fixspice.py b/common/fixspice.py
index a12ae42..dc2fd04 100755
--- a/common/fixspice.py
+++ b/common/fixspice.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # fixspice ---
 #

diff --git a/common/print_subckt_params.py b/common/print_subckt_params.py
index c8f75eb..66786ca 100755
--- a/common/print_subckt_params.py
+++ b/common/print_subckt_params.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # print_subckt_params.py --
 #

diff --git a/common/spectre_to_spice.py b/common/spectre_to_spice.py
index 2a1ff64..4243a1a 100755
--- a/common/spectre_to_spice.py
+++ b/common/spectre_to_spice.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 # Script to read all files in a directory of SPECTRE-compatible device model
 # files, and convert them to a form that is compatible with ngspice.
 

diff --git a/common/split_gds.py b/common/split_gds.py
index 5336d8e..1a26ee6 100755
--- a/common/split_gds.py
+++ b/common/split_gds.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # split_gds.py --
 #

diff --git a/common/split_spice.py b/common/split_spice.py
index f7cc695..dedad24 100755
--- a/common/split_spice.py
+++ b/common/split_spice.py

@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # split_spice.py --
 #

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 ---
 #