diff --git a/nixos/modules/services/web-apps/dolibarr.nix b/nixos/modules/services/web-apps/dolibarr.nix
index 136720ef67b4..877490652989 100644
--- a/nixos/modules/services/web-apps/dolibarr.nix
+++ b/nixos/modules/services/web-apps/dolibarr.nix
@@ -312,7 +312,7 @@ in
       systemd.services."phpfpm-dolibarr".after = mkIf cfg.database.createLocally [ "mysql.service" ];
       services.phpfpm.pools.dolibarr = {
         inherit (cfg) user group;
-        phpPackage = pkgs.php.buildEnv {
+        phpPackage = pkgs.php83.buildEnv {
           extensions = { enabled, all }: enabled ++ [ all.calendar ];
           # recommended by dolibarr web application
           extraConfig = ''
@@ -339,13 +339,17 @@ in
         description = "dolibarr configuration file management via NixOS";
         wantedBy = [ "multi-user.target" ];
 
-        script = ''
-          # extract the 'main instance unique id' secret that the dolibarr installer generated for us, store it in a file for use by our own NixOS generated configuration file
-          ${pkgs.php}/bin/php -r "include '${cfg.stateDir}/conf.php'; file_put_contents('${cfg.stateDir}/dolibarr_main_instance_unique_id', \$dolibarr_main_instance_unique_id);"
+        script =
+          let
+            php = lib.getExe config.services.phpfpm.pools.dolibarr.phpPackage;
+          in
+          ''
+            # extract the 'main instance unique id' secret that the dolibarr installer generated for us, store it in a file for use by our own NixOS generated configuration file
+            ${php} -r "include '${cfg.stateDir}/conf.php'; file_put_contents('${cfg.stateDir}/dolibarr_main_instance_unique_id', \$dolibarr_main_instance_unique_id);"
 
-          # replace configuration file generated by installer with the NixOS generated configuration file
-          install -m 440 ${mkConfigFile "conf.php" cfg.settings} '${cfg.stateDir}/conf.php'
-        '';
+            # replace configuration file generated by installer with the NixOS generated configuration file
+            install -m 440 ${mkConfigFile "conf.php" cfg.settings} '${cfg.stateDir}/conf.php'
+          '';
 
         serviceConfig = {
           Type = "oneshot";