diff --git a/Formula/g/gaffitter.rb b/Formula/g/gaffitter.rb
index 0f7024f4a6a463..21a15777bf20a6 100644
--- a/Formula/g/gaffitter.rb
+++ b/Formula/g/gaffitter.rb
@@ -3,7 +3,7 @@ class Gaffitter < Formula
   homepage "https://gaffitter.sourceforge.net/"
   url "https://downloads.sourceforge.net/project/gaffitter/gaffitter/1.0.0/gaffitter-1.0.0.tar.gz"
   sha256 "c85d33bdc6c0875a7144b540a7cce3e78e7c23d2ead0489327625549c3ab23ee"
-  license "GPL-3.0"
+  license "GPL-3.0-or-later"
 
   bottle do
     sha256 cellar: :any_skip_relocation, arm64_sonoma:   "9db231f5fd261b380cc7ef6840714a66e286bb3ad67c9643942d1d62eb79798d"
@@ -25,10 +25,9 @@ class Gaffitter < Formula
   depends_on "cmake" => :build
 
   def install
-    mkdir "build" do
-      system "cmake", "..", *std_cmake_args
-      system "make", "install"
-    end
+    system "cmake", "-S", ".", "-B", "build", *std_cmake_args
+    system "cmake", "--build", "build"
+    system "cmake", "--install", "build"
   end
 
   test do