diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f862790fa..1c4ac4e91 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,6 +6,7 @@ on:
       - main
       - preprod/**
       - dev/**
+      - exp-**
 
 env:
   DOCKER_REGISTRY: ghcr.io
@@ -48,8 +49,9 @@ jobs:
 
       - name: Determine changes files
         run: |
+          PREVIOUS_TAG=$(git tag --sort version:refname | tail -n 2 | head -n 1)
           # Create a comma-separated list of changed files for use in build.gradle.kts
-          CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r -m $GITHUB_SHA | tr '\r\n' ',' | sed -e 's/,$//' | tr -d '"')
+          CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r -m $PREVIOUS_TAG $GITHUB_REF | tr '\r\n' ',' | sed -e 's/,$//' | tr -d '"')
           echo "CHANGED_FILES=$CHANGED_FILES" >> $GITHUB_ENV
 
       - name: Determine projects to deploy