diff --git a/scripts/debian/postinst b/scripts/debian/postinst
index abcfede0ad25c50075200aad950972a70a61363f..edcb12d60c849793bc7081383bb851867d53a89f 100755
--- a/scripts/debian/postinst
+++ b/scripts/debian/postinst
@@ -26,7 +26,7 @@ case "$1" in
     echo "  Adding iri-scripts-path.sh to /etc/profile.d..."
     FILE="/etc/profile.d/iri-scripts-path.sh"
     sudo echo "# Expand PATH to include the directory where IRI scripts go." > $FILE
-    sudo echo "iri_script_path=\"/usr/share/iri\"" >> $FILE
+    sudo echo "iri_script_path=\"/usr/local/share/iri:/usr/share/iri\"" >> $FILE
     sudo echo "if [ -n \"\${PATH##*\${iri_script_path}}\" -a -n \"\${PATH##*\${iri_script_path}:*}\" ]; then" >> $FILE
     sudo echo "    export PATH=\$PATH:\${iri_script_path}" >> $FILE
     sudo echo "fi" >> $FILE
diff --git a/scripts/unbind_ftdi_udev.sh b/scripts/unbind_ftdi_udev.sh
index fbaaf65835a476546872368bdb718b9458f93914..9a3a12bf09886c6744d900091f06d2a38e7ca51c 100755
--- a/scripts/unbind_ftdi_udev.sh
+++ b/scripts/unbind_ftdi_udev.sh
@@ -38,7 +38,6 @@ done
 shift $((OPTIND-1))
 
 
-FILE=/etc/udev/rules.d/$FILE
 FILE=/etc/udev/rules.d/$FILE
 
 echo "  Add udev rule so VENDOR:PRODUCT:SERIAL=${VENDOR}:${PRODUCT}:${SERIAL} devices do not load ftdi_sio driver."
diff --git a/scripts/undo_unbind_ftdi_udev.sh b/scripts/undo_unbind_ftdi_udev.sh
index 47c25d9863797e72c30442481fea151645141ee6..6d25f0b0eb9f776af2cb7ce3b36f961d9797686a 100755
--- a/scripts/undo_unbind_ftdi_udev.sh
+++ b/scripts/undo_unbind_ftdi_udev.sh
@@ -36,8 +36,8 @@ echo "Removing all lines containing SERIAL=${SERIAL} from file: ${FILE}"
 LINE0=${SERIAL}
 sudo sed -i "/${LINE0}/d" $FILE
 
-sed -i -E "/idVendor.*$VENDOR.*idProduct.*$PRODUCT.*serial.*$SERIAL.*MODE.*0666\"/d" $FILE 
-sed -i -E "/idVendor.*$VENDOR.*idProduct.*$PRODUCT.*serial.*$SERIAL.*RUN.*ftdi_sio\/unbind/d" $FILE 
+sudo sed -i -E "/idVendor.*$VENDOR.*idProduct.*$PRODUCT.*serial.*$SERIAL.*MODE.*0666\"/d" $FILE
+sudo sed -i -E "/idVendor.*$VENDOR.*idProduct.*$PRODUCT.*serial.*$SERIAL.*RUN.*ftdi_sio\/unbind/d" $FILE 
 
 sudo service udev restart
 echo "Need to unplug-plug devices for changes to take effect"
\ No newline at end of file