diff --git a/pkgs/applications/networking/mailreaders/notmuch/default.nix b/pkgs/applications/networking/mailreaders/notmuch/default.nix
index 7cbec61b5e2..04d4eaebaa7 100644
--- a/pkgs/applications/networking/mailreaders/notmuch/default.nix
+++ b/pkgs/applications/networking/mailreaders/notmuch/default.nix
@@ -28,6 +28,7 @@ stdenv.mkDerivation rec {
 
     for src in \
       crypto.c \
+      notmuch-config.c \
       emacs/notmuch-crypto.el
     do
       substituteInPlace "$src" \