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diff --git a/coin/provisioning/common/unix/pyenv.rb b/coin/provisioning/common/unix/pyenv.rb
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+class Pyenv < Formula
+  desc "Python version management"
+  homepage "https://github.com/pyenv/pyenv"
+  url "https://github.com/pyenv/pyenv/archive/refs/tags/v2.3.15.tar.gz"
+  sha256 "cf6499e1c8f18fb3473c2afdf5f14826fd42a1c4b051219faea104e38036e4bb"
+  license "MIT"
+  version_scheme 1
+  head "https://github.com/pyenv/pyenv.git", branch: "master"
+
+  livecheck do
+    url :stable
+    regex(/^v?(\d+(?:\.\d+)+(-\d+)?)$/i)
+  end
+
+  bottle do
+    sha256 cellar: :any,                 arm64_ventura:  "ff68efd633ee282abb0c0a6ba72f90d5248644f3143f40e15841b6ae7996e3cd"
+    sha256 cellar: :any,                 arm64_monterey: "af7621550cc7c005549d96218d2606a521e12595f2efc9ae9d8523cc46d318ba"
+    sha256 cellar: :any,                 arm64_big_sur:  "69d69ceeea16fe45346d8856bf213c0a0e48220097635cf17d40b98fa8e12f83"
+    sha256 cellar: :any,                 ventura:        "48fb21656dc11dc0a6ef25eb7cb5e8829485c1e1fac7d1ca596a46771a9ad91d"
+    sha256 cellar: :any,                 monterey:       "96ba1d1702b7620dd9d0d2fe030af4d31c83504afea1b119910ab2e9c9fbb08c"
+    sha256 cellar: :any,                 big_sur:        "f96dfcecefb40d4794a8ea3ef5981bdeab6e64c412f18f0c128b1d64fe87d913"
+    sha256 cellar: :any_skip_relocation, x86_64_linux:   "83737a776f4828a7fb5eb289b10418b7cf829cccca3fc634d7dfe7c96aff4e7e"
+  end
+
+  depends_on "autoconf"
+  depends_on "openssl@3"
+  depends_on "pkg-config"
+  depends_on "readline"
+
+  uses_from_macos "python" => :test
+  uses_from_macos "bzip2"
+  uses_from_macos "libffi"
+  uses_from_macos "ncurses"
+  uses_from_macos "xz"
+  uses_from_macos "zlib"
+
+  def install
+    inreplace "libexec/pyenv", "/usr/local", HOMEBREW_PREFIX
+    inreplace "libexec/pyenv-rehash", "$(command -v pyenv)", opt_bin/"pyenv"
+    inreplace "pyenv.d/rehash/source.bash", "$(command -v pyenv)", opt_bin/"pyenv"
+
+    system "src/configure"
+    system "make", "-C", "src"
+
+    prefix.install Dir["*"]
+    %w[pyenv-install pyenv-uninstall python-build].each do |cmd|
+      bin.install_symlink "#{prefix}/plugins/python-build/bin/#{cmd}"
+    end
+
+    share.install prefix/"man"
+
+    # Do not manually install shell completions. See:
+    #   - pyenv/pyenv#1056#issuecomment-356818337
+    #   - Homebrew/homebrew-core#22727
+  end
+
+  test do
+    # Create a fake python version and executable.
+    pyenv_root = Pathname(shell_output("#{bin}/pyenv root").strip)
+    python_bin = pyenv_root/"versions/1.2.3/bin"
+    foo_script = python_bin/"foo"
+    foo_script.write "echo hello"
+    chmod "+x", foo_script
+
+    # Test versions.
+    versions = shell_output("eval \"$(#{bin}/pyenv init --path)\" " \
+                            "&& eval \"$(#{bin}/pyenv init -)\" " \
+                            "&& #{bin}/pyenv versions").split("\n")
+    assert_equal 2, versions.length
+    assert_match(/\* system/, versions[0])
+    assert_equal("  1.2.3", versions[1])
+
+    # Test rehash.
+    system bin/"pyenv", "rehash"
+    refute_match "Cellar", (pyenv_root/"shims/foo").read
+    assert_equal "hello", shell_output("eval \"$(#{bin}/pyenv init --path)\" " \
+                                       "&& eval \"$(#{bin}/pyenv init -)\" " \
+                                       "&& PYENV_VERSION='1.2.3' foo").chomp
+  end
+end