conan: Fix build

conan has very strict requirements on the versions of its dependencies.
This patch adds downgraded versinos of node-semver and distro to
statisfy these requirements.

pkgs/development/python-modules/distro/11.nix

@@ -0,0 +1,26 @@
+{ stdenv, fetchPypi, buildPythonPackage, pytest, pytestcov, tox }:
+
+buildPythonPackage rec {
+  name = "${pname}-${version}";
+  pname = "distro";
+  version = "1.1.0";
+
+  buildInputs = [ pytest pytestcov tox];
+
+  checkPhase = ''
+    touch tox.ini
+    tox
+  '';
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1vn1db2akw98ybnpns92qi11v94hydwp130s8753k6ikby95883j";
+  };
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/nir0s/distro;
+    description = "Linux Distribution - a Linux OS platform information API.";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ nand0p ];
+  };
+}

pkgs/development/python-modules/node-semver/2.nix

@@ -0,0 +1,21 @@
+{ stdenv, fetchPypi, buildPythonPackage, pytest, tox }:
+
+buildPythonPackage rec {
+  name = "${pname}-${version}";
+  version = "0.2.0";
+  pname = "node-semver";
+
+  buildInputs = [ pytest tox ];
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1080pdxrvnkr8i7b7bk0dfx6cwrkkzzfaranl7207q6rdybzqay3";
+  };
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/podhmo/python-semver;
+    description = "A port of node-semver";
+    license = licenses.mit;
+    platforms = platforms.all;
+  };
+}