diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index c1a8b57..d36bbb2 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -31,3 +31,9 @@ jobs:
       - uses: ./this-action/
         with:
           use-latex: ${{ matrix.use-latex }}
+      - name: Check for unwanted files
+        shell: bash
+        run: |
+          test ! -f output.log
+          test ! -f __DOC_CHECKER__.g
+          find doc \( -name '*.aux' -o -name '*.bbl' -o -name '*.blg' -o -name '*.brf' -o -name '*.idx' -o -name '*.ilg' -o -name '*.ind' -o -name '*.log' -o -name '*.out' -o -name '*.pnr' -o -name '*.toc' -o -name '*.tst' \) -exec test ! -f {} +
diff --git a/action.yml b/action.yml
index ce3bbaf..6f5ef75 100644
--- a/action.yml
+++ b/action.yml
@@ -55,7 +55,7 @@ runs:
       shell: bash
       run: |
         if [ -f "makedoc.g" ]; then
-          $GAP makedoc.g -c "QUIT;" 2>&1 | tee output.log
+          $GAP makedoc.g -c "QUIT;" 2>&1 | tee $RUNNER_TEMP/output.log
         elif [ -x "doc/make_doc" ]; then
           # If the package is called <pkg_name>, then the <doc/make_doc> script
           # most likely assumes that it has been called from the within the
@@ -65,7 +65,7 @@ runs:
           # So we create symlinks to some potentially-useful GAP directories.
           [ -d ../../doc ] && echo "../../doc exists" || ln -s $GAPROOT/doc ../../doc
           [ -d ../../etc ] && echo "../../etc exists" || ln -s $GAPROOT/etc ../../etc
-          cd doc && ./make_doc  2>&1 | tee output.log
+          cd doc && ./make_doc  2>&1 | tee $RUNNER_TEMP/output.log
         elif [ -f "doc/make_doc" ]; then
           echo "doc/make_doc exists but is not executable!"
           exit 1
@@ -84,15 +84,15 @@ runs:
       # label warnings are sometimes false positives. Moreover, GAPDoc can
       # identify this issues, hence we ignore the ones from LaTeX.
       run: |
-        if grep -i -e "warning\b" output.log | grep -qiv "LaTeX Warning: Label(s) may have changed."; then
+        if grep -i -e "warning\b" $RUNNER_TEMP/output.log | grep -qiv "LaTeX Warning: Label(s) may have changed."; then
           echo "Warnings were found when building the documentation!"
-          grep -i -e "warning\b" output.log
+          grep -i -e "warning\b" $RUNNER_TEMP/output.log
           exit 1
         fi
     - name: "Check documentation is compiled"
       shell: bash
       run: |
-        cat > __DOC_CHECKER__.g <<EOF
+        cat > $RUNNER_TEMP/__DOC_CHECKER__.g <<EOF
 
         Read("PackageInfo.g");
         doc_infos := GAPInfo.PackageInfoCurrent.PackageDoc;
@@ -119,4 +119,9 @@ runs:
         od;
 
         EOF
-        $GAP __DOC_CHECKER__.g -c "QUIT;"
+        $GAP $RUNNER_TEMP/__DOC_CHECKER__.g -c "QUIT;"
+
+    - name: "Remove auxiliary files"
+      shell: bash
+      run: |
+        find doc \( -name '*.aux' -o -name '*.bbl' -o -name '*.blg' -o -name '*.brf' -o -name '*.idx' -o -name '*.ilg' -o -name '*.ind' -o -name '*.log' -o -name '*.out' -o -name '*.pnr' -o -name '*.toc' -o -name '*.tst' \) -exec rm -f {} +