diff --git a/pkgs/by-name/pr/prr/package.nix b/pkgs/by-name/pr/prr/package.nix
index 6fa8a417a58f..57c09cb8c8db 100644
--- a/pkgs/by-name/pr/prr/package.nix
+++ b/pkgs/by-name/pr/prr/package.nix
@@ -23,7 +23,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
 
   nativeBuildInputs = [ pkg-config ];
 
-  SSL_CERT_FILE = "${cacert}/etc/ssl/certs/ca-bundle.crt";
+  env.SSL_CERT_FILE = "${cacert}/etc/ssl/certs/ca-bundle.crt";
+
   checkInputs = [ cacert ];
 
   meta = {