diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 1d7dc593ab11e7..2b4ac751bc907a 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -114,7 +114,7 @@ jobs:
       - name: Build shared GC (${{ matrix.gc_name }})
         run: >
           mkdir ${{ matrix.shared_gc_dir }} &&
-          LD_LIBRARY_PATH=${{ srcdir }}/gc/mmtk/target/release
+          LD_LIBRARY_PATH=/home/runner/work/ruby/ruby/src/gc/mmtk/target/release
           make shared-gc SHARED_GC=${{ matrix.gc_name }} MMTK_BUILD=debug
         if: ${{ matrix.shared_gc }}