diff --git a/app/Jobs/ApplicationDeploymentJob.php b/app/Jobs/ApplicationDeploymentJob.php
index 26cef35d7..e9b4667ab 100644
--- a/app/Jobs/ApplicationDeploymentJob.php
+++ b/app/Jobs/ApplicationDeploymentJob.php
@@ -2498,10 +2498,10 @@ private function build_railpack_image(): void
             $prepare_command .= " {$this->env_railpack_args}";
         }
         if ($this->application->build_command) {
-            $prepare_command .= ' --build-cmd '.escapeShellValue($this->application->build_command);
+            $prepare_command .= ' --env '.escapeShellValue("RAILPACK_BUILD_CMD={$this->application->build_command}");
         }
         if ($this->application->start_command) {
-            $prepare_command .= ' --start-cmd '.escapeShellValue($this->application->start_command);
+            $prepare_command .= ' --env '.escapeShellValue("RAILPACK_START_CMD={$this->application->start_command}");
         }
         if ($this->application->install_command) {
             $prepare_command .= ' --env '.escapeShellValue("RAILPACK_INSTALL_CMD={$this->application->install_command}");