diff --git a/flake.nix b/flake.nix
index 63167eef..f168baa2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -36,8 +36,6 @@
 
       generic = import ./nix/generic.nix { inherit version meta; };
 
-      # not generic: solstice lefdef equinox knik coloquinte bootstrap
-
       pythonComponents = [
         "vlsisapd" "hurricane" "crlcore" "flute" "etesian"
         "anabatic" "katana" "bora" "katabatic" "kite"
diff --git a/nix/crlcore.nix b/nix/crlcore.nix
index f8a85cc1..57a2cccb 100644
--- a/nix/crlcore.nix
+++ b/nix/crlcore.nix
@@ -1,20 +1,19 @@
 { generic, ... }:
 let pkg =
-  { libxml2, qt4, bison, flex, doxygen, coriolis-vlsisapd
+  { lib, libxml2, qt4, bison, flex, doxygen, coriolis-vlsisapd
   , coriolis-lefdef, coriolis-hurricane, python2Packages }:
   {
     name = "crlcore";
     src = ../crlcore;
-    buildInputs = [ libxml2 qt4 coriolis-lefdef coriolis-vlsisapd coriolis-hurricane python2Packages.pyqt4 python2Packages.sip_4 ];
+    buildInputs = [ libxml2 qt4 coriolis-lefdef coriolis-vlsisapd coriolis-hurricane python2Packages.pyqt4 ];
     nativeBuildInputs = [ bison flex doxygen python2Packages.pyqt4 ];
     pythonImportsCheck = [
       "CRL" "Constant" "helpers.io" "helpers.technology"
       "helpers.utils" "helpers.analogtechno" "helpers" "helpers.overlay"
     ];
-    continuation = drv: drv.overrideAttrs (o: {
-      postInstall = (o.postInstall or "") + ''
-        ln -s crlcore/helpers $out/${python2Packages.python.sitePackages}/helpers
-      '';
-    });
+    postInstall = ''
+      ln -s crlcore/helpers $out/${python2Packages.python.sitePackages}/helpers
+    '';
+    meta.license = lib.licenses.gpl2Plus;
   };
 in generic pkg
diff --git a/nix/generic.nix b/nix/generic.nix
index 24ebe73c..f16a0517 100644
--- a/nix/generic.nix
+++ b/nix/generic.nix
@@ -1,35 +1,41 @@
 { version, meta }:
 
-let f =
-  { lib, stdenv, cmake, ninja, boost
-  , coriolis-bootstrap, python2Packages }:
-  { name
-  , src
-  , buildInputs ? []
-  , nativeBuildInputs ? []
-  , propagatedBuildInputs ? []
-  , pythonImportsCheck
-  , continuation ? (x: x)
-  }:
-  let
-    boostWithPython = boost.override { enablePython = true; inherit (python2Packages) python; };
-    drv = stdenv.mkDerivation {
-      pname = "coriolis-${name}";
+let
+  meta' = meta;
+  f =
+    { lib, stdenv, cmake, ninja, boost
+    , coriolis-bootstrap, python2Packages }:
+    let self =
+      { name
+      , buildInputs ? []
+      , nativeBuildInputs ? []
+      , meta ? {}
+      , pythonImportsCheck
+      , continuation ? (x: x)
+      , ...
+      }@args':
+      let
+        args = builtins.removeAttrs args' (builtins.attrNames (builtins.functionArgs self));
+        boostWithPython = boost.override { enablePython = true; inherit (python2Packages) python; };
+        drv = stdenv.mkDerivation ({
+          pname = "coriolis-${name}";
 
-      buildInputs = [ python2Packages.python boostWithPython ] ++ buildInputs;
-      nativeBuildInputs = [
-        coriolis-bootstrap cmake ninja
-        python2Packages.pythonImportsCheckHook
-      ] ++ nativeBuildInputs;
-      inherit propagatedBuildInputs;
+          buildInputs = [ python2Packages.python boostWithPython ] ++ buildInputs;
+          nativeBuildInputs = [
+            coriolis-bootstrap cmake ninja
+            python2Packages.pythonImportsCheckHook
+          ] ++ nativeBuildInputs;
 
-      preInstall = ''
-          export PYTHONPATH="$out/${python2Packages.python.sitePackages}:$PYTHONPATH"
-      '';
+          preInstall = ''
+              export PYTHONPATH="$out/${python2Packages.python.sitePackages}:$PYTHONPATH"
+          '';
 
-      inherit version meta src pythonImportsCheck;
-    };
-  in continuation (python2Packages.toPythonModule drv);
+          meta = meta // meta';
+
+          inherit version pythonImportsCheck;
+        } // args);
+      in continuation (python2Packages.toPythonModule drv);
+    in self;
 in
 
 pkg:
diff --git a/nix/hurricane.nix b/nix/hurricane.nix
index 7af6fb9e..9ce5ab67 100644
--- a/nix/hurricane.nix
+++ b/nix/hurricane.nix
@@ -8,6 +8,6 @@ let pkg =
     buildInputs = [ libxml2 qt4 bzip2 rapidjson coriolis-vlsisapd ];
     nativeBuildInputs = [ bison flex doxygen ];
     pythonImportsCheck = [ "Viewer" "Hurricane" "Cfg2" "Analog" ];
-    continuation = drv: drv.overrideAttrs (o: { meta = o.meta // { license = lib.licenses.lgpl3Plus; });
+    meta.license = lib.licenses.lgpl3Plus;
   };
 in generic pkg