Run command directly?

.gitlab-ci-build.yml.in

@@ -46,8 +46,7 @@ stages:
     - echo $COMMAND
   script:
     - export EFI_DIR="$(dirname "$(find /nix/store -name OVMF_VARS.fd | head -1)")/"
-    - echo $COMMAND > build.sh
-    - bash build.sh || exit 1
+    - $COMMAND || exit 1
 
 qemu.amd64:
   extends: .build
@@ -80,9 +79,7 @@ hyperv-iso.amd64:
   parallel:
     matrix: []
   script:
-    - echo "which packer" > build.sh
-    - echo $COMMAND >> build.sh
-    - bash build.sh || exit 1
+    - $COMMAND || exit 1
   after_script: |-
     if [ "$CI_JOB_STATUS" == "success" ]; then
       xonsh test.xsh