diff --git a/.gitea/workflows/build-xelatex.yml b/.gitea/workflows/build-xelatex.yml
index dd0a73d..dc0e002 100644
--- a/.gitea/workflows/build-xelatex.yml
+++ b/.gitea/workflows/build-xelatex.yml
@@ -18,7 +18,7 @@ jobs:
             - name: Find all root .tex files
               id: roots
               run: |
-                  ROOTS=$(grep -rlzP '%ROOT\\s*\\n\\\\documentclass' --include='*.tex' . | sed 's|^\./||' | tr '\n' ' ')
+                  ROOTS=$(grep -rlzP '%ROOT\\s*\\n\\\\documentclass' --include='*.tex' . | tr '\0' '\n' | sed 's|^\./||' | tr '\n' ' ')
                   echo "roots=$ROOTS" >> "$GITHUB_OUTPUT"
                   echo "Root files to build: $ROOTS"