Try derive hosts from derivation, too

lib.nix

@@ -5,17 +5,14 @@ with pkgs;
 let
   requiredPackages = import ./required-packages.nix { inherit pkgs nodejs; };
   website = settings: stdenv.mkDerivation {
+    inherit (settings) src ssl host;
     name = "blog-static";
-    version = settings.source.rev;
-    src = settings.source;
-    ssl = settings.ssl;
+    version = settings.src.rev;
     urlSub =
       let
         regexEscape = lib.escape [ "/" "(" ")" "[" "]" "+" "*" "\\" ];
       in
-        if (settings ? replaceUrl)
-        then (with settings.replaceUrl; "s/${regexEscape from}/${regexEscape to}/g")
-        else "";
+        with settings.replaceUrl; "s/${regexEscape from}/${regexEscape to}/g";
     publicPath = settings.path;
     extraFlags = if settings.drafts then " -D " else "";
     builder = ./build/builder.sh;
@@ -29,13 +26,14 @@ let
       (ruby.withPackages (ps: [ ps.nokogiri ]))
     ];
   };
-  wrapHost = ssl: host: (if ssl then "https" else "http") + "//${host}";
+  wrapHost = ssl: host: (if ssl then "https" else "http") + "://${host}";
 in
   {
     english = settings: website {
+      inherit (settings) host;
       ssl = settings.ssl or false;
       drafts = settings.drafts or false;
-      source = blog-source;
+      src = blog-source;
       path = ".";
       replaceUrl = {
         from = "https://danilafe.com";
@@ -43,9 +41,10 @@ in
       };
     };
     russian = settings: website {
+      inherit (settings) host;
       ssl = settings.ssl or false;
       drafts = settings.drafts or false;
-      source = blog-source-localized;
+      src = blog-source-localized;
       path = "ru";
       replaceUrl = {
         from = "https://ru.danilafe.com";