diff --git a/pkgs/servers/mail/spamassassin/default.nix b/pkgs/servers/mail/spamassassin/default.nix
index ea69d036f958..e46a76a9b0c0 100644
--- a/pkgs/servers/mail/spamassassin/default.nix
+++ b/pkgs/servers/mail/spamassassin/default.nix
@@ -32,6 +32,7 @@ buildPerlPackage rec {
   doCheck = false;
 
   postInstall = ''
+    mkdir -p $out/share/spamassassin
     mv "rules/"* $out/share/spamassassin/
 
     for n in "$out/bin/"*; do