diff --git a/.changeset/stale-cameras-teach.md b/.changeset/stale-cameras-teach.md
new file mode 100644
index 000000000..e2a1bf196
--- /dev/null
+++ b/.changeset/stale-cameras-teach.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Pass "site" config to Snowpack as "baseUrl"
diff --git a/packages/astro/src/runtime.ts b/packages/astro/src/runtime.ts
index 9eeab014b..6ad261272 100644
--- a/packages/astro/src/runtime.ts
+++ b/packages/astro/src/runtime.ts
@@ -406,6 +406,7 @@ async function createSnowpack(astroConfig: AstroConfig, options: CreateSnowpackO
       tailwindConfig: astroConfig.devOptions.tailwindConfig,
     },
     buildOptions: {
+      baseUrl: astroConfig.buildOptions.site,
       out: astroConfig.dist,
     },
     packageOptions: {