diff --git a/pkgs/packages/webserver/package.nix b/pkgs/packages/webserver/package.nix
index 111dc38..9deeb2b 100644
--- a/pkgs/packages/webserver/package.nix
+++ b/pkgs/packages/webserver/package.nix
@@ -237,7 +237,11 @@ rustPlatform.buildRustPackage (drv: {
 
   buildPhase = ''
     runHook preBuild
+
+    # dart-sass and wasm-pack want a home directory to put cache files
+    export HOME=$(mktemp -d)
     cargo leptos build --release
+
     runHook postBuild
   '';