diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 8ab6fce..a227547 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -74,7 +74,8 @@ jobs:
 
           // Use ENABLE_SELF_HOSTED to decide what the build matrix below
           // should include.
-          const {hosted, selfHosted} = require("${{ github.workspace }}/repo-src/build-matrix.json");
+          const buildMatrix = JSON.parse(fs.readFileSync("${{ github.workspace }}/repo-src/build-matrix.json"));
+          const {hosted, selfHosted} = buildMatrix;
           const matrix = enableSelfHosted ? hosted.concat(selfHosted) : hosted;
 
           // Output a JSON object consumed by the build matrix below.