diff --git a/.github/workflows/nightly-builds.yml b/.github/workflows/nightly-builds.yml
index 66872149ce0..dbc98b68203 100644
--- a/.github/workflows/nightly-builds.yml
+++ b/.github/workflows/nightly-builds.yml
@@ -172,7 +172,7 @@ jobs:
           sudo apt-get install graphviz
           # genjavadoc does not support Scala 3.x
           sbt \
-            -Dpekko.genjavadoc.enabled={{ matrix.scalaVersion != '3.3' }} \
+            -Dpekko.genjavadoc.enabled=${{ matrix.scalaVersion != '3.3' }} \
             "+~ ${{ matrix.scalaVersion }} doc"
 
       - name: Publish