Fix pob update script

scripts/update-pob.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -eo pipefail
+set -x
 
 # TODO: Update pobfrontend as well?
 
@@ -14,8 +15,12 @@ hash=$(jq '.args.hash' <<< "$nurl_output")
 echo "Updating pob to $rev"
 
 # Find lines to replace
-line_numbers=$(grep -Fn "rev =" packages/pob.nix| cut -d":" -f1)
-line_data=$(head -n1 <<< "$line_numbers")
+rev_line_numbers=$(grep -Fn "rev =" packages/pob.nix| cut -d":" -f1)
+rev_line_data=$(head -n1 <<< "$rev_line_numbers")
+sed -i "${rev_line_data}s/.*/  rev = $rev;/" packages/pob.nix
+
+hash_line_numbers=$(grep -Fn "hash =" packages/pob.nix| cut -d":" -f1)
+hash_line_data=$(head -n1 <<< "$hash_line_numbers")
+sed -i "${hash_line_data}s/.*/  hash = $hash;/" packages/pob.nix
 
-sed -i "${line_data}s/.*/  rev = $rev;/" packages/pob.nix
 nixfmt packages/pob.nix