diff --git a/package/homebrew/magnum.rb b/package/homebrew/magnum.rb
index e2d17c0b4..050507347 100644
--- a/package/homebrew/magnum.rb
+++ b/package/homebrew/magnum.rb
@@ -1,9 +1,10 @@
 class Magnum < Formula
   desc "C++11/C++14 graphics middleware for games and data visualization"
   homepage "https://magnum.graphics"
-  url "https://github.com/mosra/magnum/archive/v2020.06.tar.gz"
-  # wget https://github.com/mosra/magnum/archive/v2020.06.tar.gz -O - | sha256sum
-  sha256 "98dfe802e56614e4e6bf750d9b693de46a5ed0c6eb479b0268f1a20bf34268bf"
+  # git describe origin/master, except the `v` prefix
+  version "2020.06-3494-gb85f0c8df"
+  # Clone instead of getting an archive to have tags for version.h generation
+  url "https://github.com/mosra/magnum.git", revision: "b85f0c8df"
   head "https://github.com/mosra/magnum.git"
 
   depends_on "cmake" => :build
@@ -12,15 +13,6 @@ class Magnum < Formula
   depends_on "glfw"
 
   def install
-    # 2020.06 has the options unprefixed, current master has them prefixed.
-    # Options not present in 2020.06 are prefixed always.
-    option_prefix = build.head? ? 'MAGNUM_' : ''
-    # 2020.06 has CMake 3.5 as minimum required for backwards compatibility
-    # purposes, but it works with any newer. CMake 4.0 removed compatibility
-    # with it and suggests this as an override.
-    # TODO remove once a new release is finally made
-    extra_cmake_args = build.head? ? [] : ['-DCMAKE_POLICY_VERSION_MINIMUM=3.5']
-
     system "mkdir build"
     cd "build" do
       system "cmake",
@@ -31,7 +23,7 @@ class Magnum < Formula
         # add this, which ultimately results in `-DCMAKE_FIND_FRAMEWORK=FIRST`
         # being passed to CMake. No idea what's going on, the regular CI build
         # outside of Homebrew (although with CMake 3.26) doesn't need that.
-        *(std_cmake_args(find_framework: "FIRST") + extra_cmake_args),
+        *std_cmake_args(find_framework: "FIRST"),
         # Without this, ARM builds will try to look for dependencies in
         # /usr/local/lib and /usr/lib (which are the default locations) instead
         # of /opt/homebrew/lib which is dedicated for ARM binaries. Please
@@ -43,31 +35,31 @@ class Magnum < Formula
         # plugins and not those from the magnum-plugins package. Please
         # complain to Homebrew about this insane filesystem layout.
         "-DMAGNUM_PLUGINS_DIR=#{HOMEBREW_PREFIX}/lib/magnum",
-        "-D#{option_prefix}WITH_AUDIO=ON",
-        "-D#{option_prefix}WITH_GLFWAPPLICATION=ON",
-        "-D#{option_prefix}WITH_SDL2APPLICATION=ON",
-        "-D#{option_prefix}WITH_WINDOWLESSCGLAPPLICATION=ON",
-        "-D#{option_prefix}WITH_CGLCONTEXT=ON",
-        "-D#{option_prefix}WITH_OPENGLTESTER=ON",
-        "-D#{option_prefix}WITH_ANYAUDIOIMPORTER=ON",
-        "-D#{option_prefix}WITH_ANYIMAGECONVERTER=ON",
-        "-D#{option_prefix}WITH_ANYIMAGEIMPORTER=ON",
-        "-D#{option_prefix}WITH_ANYSCENECONVERTER=ON",
-        "-D#{option_prefix}WITH_ANYSCENEIMPORTER=ON",
+        "-DMAGNUM_WITH_AUDIO=ON",
+        "-DMAGNUM_WITH_GLFWAPPLICATION=ON",
+        "-DMAGNUM_WITH_SDL2APPLICATION=ON",
+        "-DMAGNUM_WITH_WINDOWLESSCGLAPPLICATION=ON",
+        "-DMAGNUM_WITH_CGLCONTEXT=ON",
+        "-DMAGNUM_WITH_OPENGLTESTER=ON",
+        "-DMAGNUM_WITH_ANYAUDIOIMPORTER=ON",
+        "-DMAGNUM_WITH_ANYIMAGECONVERTER=ON",
+        "-DMAGNUM_WITH_ANYIMAGEIMPORTER=ON",
+        "-DMAGNUM_WITH_ANYSCENECONVERTER=ON",
+        "-DMAGNUM_WITH_ANYSCENEIMPORTER=ON",
         "-DMAGNUM_WITH_ANYSHADERCONVERTER=ON",
-        "-D#{option_prefix}WITH_MAGNUMFONT=ON",
-        "-D#{option_prefix}WITH_MAGNUMFONTCONVERTER=ON",
-        "-D#{option_prefix}WITH_OBJIMPORTER=ON",
-        "-D#{option_prefix}WITH_TGAIMAGECONVERTER=ON",
-        "-D#{option_prefix}WITH_TGAIMPORTER=ON",
-        "-D#{option_prefix}WITH_WAVAUDIOIMPORTER=ON",
-        "-D#{option_prefix}WITH_DISTANCEFIELDCONVERTER=ON",
-        "-D#{option_prefix}WITH_FONTCONVERTER=ON",
-        "-D#{option_prefix}WITH_IMAGECONVERTER=ON",
-        "-D#{option_prefix}WITH_SCENECONVERTER=ON",
+        "-DMAGNUM_WITH_MAGNUMFONT=ON",
+        "-DMAGNUM_WITH_MAGNUMFONTCONVERTER=ON",
+        "-DMAGNUM_WITH_OBJIMPORTER=ON",
+        "-DMAGNUM_WITH_TGAIMAGECONVERTER=ON",
+        "-DMAGNUM_WITH_TGAIMPORTER=ON",
+        "-DMAGNUM_WITH_WAVAUDIOIMPORTER=ON",
+        "-DMAGNUM_WITH_DISTANCEFIELDCONVERTER=ON",
+        "-DMAGNUM_WITH_FONTCONVERTER=ON",
+        "-DMAGNUM_WITH_IMAGECONVERTER=ON",
+        "-DMAGNUM_WITH_SCENECONVERTER=ON",
         "-DMAGNUM_WITH_SHADERCONVERTER=ON",
-        "-D#{option_prefix}WITH_GL_INFO=ON",
-        "-D#{option_prefix}WITH_AL_INFO=ON",
+        "-DMAGNUM_WITH_GL_INFO=ON",
+        "-DMAGNUM_WITH_AL_INFO=ON",
         ".."
       system "cmake", "--build", "."
       system "cmake", "--build", ".", "--target", "install"