diff --git a/pkgs/servers/mail/dovecot/2.2.x.nix b/pkgs/servers/mail/dovecot/2.2.x.nix
index 40af354a7f9..366d0fb1f32 100644
--- a/pkgs/servers/mail/dovecot/2.2.x.nix
+++ b/pkgs/servers/mail/dovecot/2.2.x.nix
@@ -52,6 +52,6 @@ stdenv.mkDerivation rec {
     homepage = "http://dovecot.org/";
     description = "Open source IMAP and POP3 email server written with security primarily in mind";
     maintainers = with stdenv.lib.maintainers; [viric simons rickynils];
-    platforms = stdenv.lib.platforms.unix;
+    hydraPlatforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/servers/mail/dovecot/default.nix b/pkgs/servers/mail/dovecot/default.nix
index 46cf742c452..5f779c75472 100644
--- a/pkgs/servers/mail/dovecot/default.nix
+++ b/pkgs/servers/mail/dovecot/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     homepage = "http://dovecot.org/";
     description = "Open source IMAP and POP3 email server written with security primarily in mind";
     maintainers = with stdenv.lib.maintainers; [viric simons];
-    platforms = with stdenv.lib.platforms; linux;
+    hydraPlatforms = stdenv.lib.platforms.linux;
   };
 
 }