diff --git a/pkgs/by-name/te/termscp/package.nix b/pkgs/by-name/te/termscp/package.nix
index b98fd8445539..73772792c00a 100644
--- a/pkgs/by-name/te/termscp/package.nix
+++ b/pkgs/by-name/te/termscp/package.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   # Needed to get openssl-sys to use pkg-config.
-  OPENSSL_NO_VENDOR = 1;
+  env.OPENSSL_NO_VENDOR = 1;
 
   nativeInstallCheckInputs = [
     versionCheckHook