1 files changed, 9 insertions, 1 deletions
diff --git a/pkgs/servers/shishi/default.nix b/pkgs/servers/shishi/default.nix
index bc4e57ba116c..a97e6847a450 100644
--- a/pkgs/servers/shishi/default.nix
+++ b/pkgs/servers/shishi/default.nix
@@ -5,8 +5,16 @@
 , pam ? null, libidn ? null, gnutls ? null
 }:
 
-with stdenv;
 let
+  mkFlag = trueStr: falseStr: cond: name: val:
+    if cond == null then null else
+      "--${if cond != false then trueStr else falseStr}${name}${if val != null && cond != false then "=${val}" else ""}";
+  mkEnable = mkFlag "enable-" "disable-";
+  mkWith = mkFlag "with-" "without-";
+  mkOther = mkFlag "" "" true;
+
+  shouldUsePkg = pkg: if pkg != null && stdenv.lib.any (x: x == stdenv.system) pkg.meta.platforms then pkg else null;
+
   optPam = shouldUsePkg pam;
   optLibidn = shouldUsePkg libidn;
   optGnutls = shouldUsePkg gnutls;