diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 344d1b7..aff973f 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -37,7 +37,7 @@ jobs:
         if: github.ref == 'refs/heads/master'
         run: make doc
         env:
-          TEXINPUTS: build/packages//:
+          TEXINPUTS: 'build/packages//:'
       - name: Prepage pages
         if: github.ref == 'refs/heads/master'
         run: |