diff --git a/core/src/nixpkgs.sld b/core/src/nixpkgs.sld
index fc14c49..2fd932c 100644
--- a/core/src/nixpkgs.sld
+++ b/core/src/nixpkgs.sld
@@ -143,7 +143,7 @@
       (define new-env (list))
       (for-each
         (lambda (kv)
-          (unless (member (car kv) '("out" "name" "builder" "system") string=?) (set! new-env (cons kv new-env))))
+          (unless (member (car kv) '("out" "name" "builder" "system" "allowedReferences" "disallowedReferences" "allowedRequisites" "disallowedRequisites") string=?) (set! new-env (cons kv new-env))))
         (derivation-env drv))
       (define is-ca-derivation (symbol? (derivation-output-hash (cdar (derivation-outputs drv)))))
       (define out-drv