diff --git a/build.lua b/build.lua
index 0ba9f88..4299278 100644
--- a/build.lua
+++ b/build.lua
@@ -1,4 +1,3 @@
-local csv = require 'streamcsv'
 local fun = require 'fun'
 local json = require 'cjson'
 local restia = require 'restia'
@@ -61,4 +60,8 @@ tree["posts.json"] = json.encode(
 
 tree["index.html"] = tostring(page("index", tree["posts.json"]))
 
+if params.cname then
+	tree.CNAME = params.cname
+end
+
 scaffold.builddir(params.output, tree)
diff --git a/lib/paramparser.lua b/lib/paramparser.lua
index 40316ee..456e556 100644
--- a/lib/paramparser.lua
+++ b/lib/paramparser.lua
@@ -8,6 +8,7 @@ return function(...)
 		{ "Input directory", "--input", "-i", 'directory' };
 		{ "Copy directory", "--copy", "-c", 'directory', 'repeatable' };
 		{ "Include unpublished posts", "--unpublished", "-u", nil };
+		{ "Set the github pages CNAME", "--cname", nil, 'domain' };
 		{ "Delete everything first", "--delete", "-d" };
 	}
 	local validate = shapeshift.table {
@@ -17,6 +18,7 @@ return function(...)
 			is.table,
 			shapeshift.each(is.string)
 		});
+		cname = shapeshift.any(is.Nil, is.string);
 		unpublished = shapeshift.default(false, shapeshift.is.boolean);
 		delete = shapeshift.default(false, shapeshift.is.boolean);
 	}
diff --git a/tasks.lua b/tasks.lua
index ceb9512..5f35b4f 100644
--- a/tasks.lua
+++ b/tasks.lua
@@ -20,7 +20,7 @@ task.build {
 		[[
 			export LUA_PATH='%s'
 			export LUA_CPATH='%s'
-			lua build.lua --copy css --copy javascript --output blog
+			lua build.lua --copy css --copy javascript --output blog --cname blog.but.gay
 		]],
 		path, cpath
 	)