diff --git a/packages/zero-schema/src/build-schema.ts b/packages/zero-schema/src/build-schema.ts
index bd74b228b..495c7964c 100644
--- a/packages/zero-schema/src/build-schema.ts
+++ b/packages/zero-schema/src/build-schema.ts
@@ -18,11 +18,15 @@ async function main() {
 
   const dirname = path.dirname(fileURLToPath(import.meta.url));
   const absoluteConfigPath = path.resolve(config.schema.path);
-  const relativePath = path.join(
+  let relativePath = path.join(
     path.relative(dirname, path.dirname(absoluteConfigPath)),
     path.basename(absoluteConfigPath),
   );
 
+  // tsImport doesn't expect to receive slashes in the Windows format when running
+  // on Windows. They need to be converted to *nix format.
+  relativePath = relativePath.replace(/\\/g, "/");
+
   try {
     const module = await tsImport(relativePath, import.meta.url);
     await writeFile(config.schema.output, await stringifySchema(module));
diff --git a/packages/zero/src/zero-cache-dev.ts b/packages/zero/src/zero-cache-dev.ts
index 5293d54b5..3d839748e 100644
--- a/packages/zero/src/zero-cache-dev.ts
+++ b/packages/zero/src/zero-cache-dev.ts
@@ -84,6 +84,7 @@ async function main() {
     log(`Running ${buildSchemaScript}.`);
     schemaProcess = spawn(buildSchemaScript, buildSchemaArgs ?? [], {
       stdio: 'inherit',
+      shell: true,
     });
 
     schemaProcess.on('exit', (code: number) => {
@@ -94,6 +95,7 @@ async function main() {
         );
         zeroCacheProcess = spawn(zeroCacheScript, zeroCacheArgs || [], {
           stdio: 'inherit',
+          shell: true,
         });
         zeroCacheProcess.on('exit', () => {
           logError(`${zeroCacheScript} exited. Exiting.`);