keyfinder-cli: use old libkeyfinder 0.11 "for now"

The tool doesn't compile against versions 2.x.
Also, fix the incorrect version number & use src.meta.homepage.

pkgs/development/libraries/libkeyfinder/0.11.nix

@@ -0,0 +1,40 @@
+{ stdenv, fetchFromGitHub, boost, fftw, qt5 }:
+
+let version = "0.11"; in
+stdenv.mkDerivation {
+  name = "libkeyfinder-${version}";
+
+  src = fetchFromGitHub {
+    sha256 = "0674gykdi1nffvba5rv6fsp0zw02w1gkpn9grh8w983xf13ykbz9";
+    rev = "v${version}";
+    repo = "libKeyFinder";
+    owner = "ibsh";
+  };
+
+  meta = with stdenv.lib; {
+    inherit version;
+    description = "Musical key detection for digital audio (C++ library)";
+    homepage = http://www.ibrahimshaath.co.uk/keyfinder/;
+    license = licenses.gpl3Plus;
+    platforms = with platforms; linux;
+    maintainers = with maintainers; [ nckx ];
+  };
+
+  buildInputs = [ fftw qt5.base ];
+  propagatedBuildInputs = [ boost ];
+
+  patchPhase = ''
+    substituteInPlace LibKeyFinder.pro --replace "/usr/local" "$out"
+  '';
+
+  configurePhase = ''
+    qmake
+  '';
+
+  enableParallelBuilding = true;
+
+  postInstall = ''
+    mkdir -p $out/include/keyfinder
+    cp *.h $out/include/keyfinder
+  '';
+}