diff --git a/pkgs/os-specific/bsd/netbsd/pkgs/source.nix b/pkgs/os-specific/bsd/netbsd/pkgs/source.nix
index 432de84ffb3e..47f200090ca4 100644
--- a/pkgs/os-specific/bsd/netbsd/pkgs/source.nix
+++ b/pkgs/os-specific/bsd/netbsd/pkgs/source.nix
@@ -8,5 +8,5 @@ fetchcvs {
   cvsRoot = ":pserver:anoncvs@anoncvs.NetBSD.org:/cvsroot";
   module = "src";
   tag = "netbsd-${lib.replaceStrings [ "." ] [ "-" ] version}-RELEASE";
-  sha256 = "sha256-+onT/ajWayaKALucaZBqoiEkvBBI400Fs2OCtMf/bYU=";
+  hash = "sha256-+onT/ajWayaKALucaZBqoiEkvBBI400Fs2OCtMf/bYU=";
 }