diff --git a/build.sh b/build.sh
index 8912d02..c3623a7 100755
--- a/build.sh
+++ b/build.sh
@@ -68,7 +68,6 @@ mkosi \
     --environment="CI_PIPELINE_URL=${CI_PIPELINE_URL:-https://invent.kde.org}" \
     --environment="VERSION_DATE=${VERSION_DATE}" \
     --image-version="$VERSION" \
-    --package-cache-dir=/var/cache/mkosi.pacman \
     --output-directory=. \
     "$@"
 
diff --git a/mkosi.conf b/mkosi.conf
index cb05bb5..fa869ce 100644
--- a/mkosi.conf
+++ b/mkosi.conf
@@ -23,6 +23,7 @@ KernelCommandLine=
 WithNetwork=true
 # Make sure kernel-install knows where we expect the ESP to be mounted so it can create correct loader entries.
 @Environment=BOOT_MNT=/efi-template
+PackageCacheDirectory=/var/cache/mkosi.pacman
 
 [Runtime]
 Console=gui