diff --git a/hydra-module.nix b/hydra-module.nix
index 059769fa..9cb7a34d 100644
--- a/hydra-module.nix
+++ b/hydra-module.nix
@@ -18,8 +18,7 @@ let
 
   env =
     { NIX_REMOTE = "daemon";
-      SSL_CERT_FILE = "/etc/ssl/certs/ca-certificates.crt";
-      OPENSSL_X509_CERT_FILE = "/etc/ssl/certs/ca-certificates.crt"; # FIXME: remove on NixOS >= 15.07
+      SSL_CERT_FILE = "/etc/ssl/certs/ca-certificates.crt"; # Remove in 16.03
       PGPASSFILE = "${baseDir}/pgpass";
     } // hydraEnv // cfg.extraEnv;