pyenv: build realpath C dylib

Closes #13521.

Signed-off-by: Tim D. Smith <git@tim-smith.us>

Formula/pyenv.rb

@@ -3,11 +3,10 @@ class Pyenv < Formula
   homepage "https://github.com/pyenv/pyenv"
   url "https://github.com/pyenv/pyenv/archive/v1.0.10.tar.gz"
   sha256 "cc071d6a63445dc1f7cefa5961c74768bc3dadf8edab5c5a7e1d63bf536a99b5"
+  revision 1
   version_scheme 1
   head "https://github.com/pyenv/pyenv.git"
 
-  bottle :unneeded
-
   depends_on "autoconf" => [:recommended, :run]
   depends_on "pkg-config" => [:recommended, :run]
   depends_on "openssl" => :recommended
@@ -15,6 +14,10 @@ class Pyenv < Formula
 
   def install
     inreplace "libexec/pyenv", "/usr/local", HOMEBREW_PREFIX
+
+    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}"