diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,6 +6,7 @@
 validate:
   stage: validate
   script:
+    - dotnet tool install -g dotnet-script
     - csi scripts/LoadYaml.csx
     - csi scripts/LoadInk.csx
   image: mcr.microsoft.com/dotnet/runtime:3.1-focal