diff --git a/pkgs/by-name/mi/mirakurun/package.nix b/pkgs/by-name/mi/mirakurun/package.nix
index 825ff812f01c..4317d296276b 100644
--- a/pkgs/by-name/mi/mirakurun/package.nix
+++ b/pkgs/by-name/mi/mirakurun/package.nix
@@ -37,7 +37,7 @@ buildNpmPackage rec {
   ];
 
   # workaround for https://github.com/webpack/webpack/issues/14532
-  NODE_OPTIONS = "--openssl-legacy-provider";
+  env.NODE_OPTIONS = "--openssl-legacy-provider";
 
   postInstall =
     let