ovn: use ovs-lib and ovs client tools from openvswitch derivation

In-tree ovs (from submodule) is not meant to be used except for linking
.so/.a to ovn binaries.

pkgs/by-name/ov/ovn/package.nix

@@ -14,6 +14,8 @@
   python3,
   unbound,
   xdp-tools,
+  openvswitch,
+  makeWrapper,
 }:
 let
   withOpensslConfigureFlag = "--with-openssl=${lib.getLib openssl.dev}";
@@ -47,6 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
     autoreconfHook
     pkg-config
     python3
+    makeWrapper
   ];
 
   buildInputs = [
@@ -88,23 +91,13 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   postInstall = ''
-    mkdir -vp $out/share/openvswitch/scripts
-    mkdir -vp $out/etc/ovn
-    cp ovs/ovsdb/ovsdb-client $out/bin
-    cp ovs/ovsdb/ovsdb-server $out/bin
-    cp ovs/ovsdb/ovsdb-tool $out/bin
-    cp ovs/vswitchd/ovs-vswitchd $out/bin
-    cp ovs/utilities/ovs-appctl $out/bin
-    cp ovs/utilities/ovs-vsctl $out/bin
-    cp ovs/utilities/ovs-ctl $out/share/openvswitch/scripts
-    cp ovs/utilities/ovs-lib $out/share/openvswitch/scripts
-    cp ovs/utilities/ovs-kmod-ctl $out/share/openvswitch/scripts
-    cp ovs/vswitchd/vswitch.ovsschema $out/share/openvswitch
-    sed -i "s#/usr/local/etc#/var/lib#g" $out/share/openvswitch/scripts/ovs-lib
-    sed -i "s#/usr/local/bin#$out/bin#g" $out/share/openvswitch/scripts/ovs-lib
-    sed -i "s#/usr/local/sbin#$out/bin#g" $out/share/openvswitch/scripts/ovs-lib
-    sed -i "s#/usr/local/share#$out/share#g" $out/share/openvswitch/scripts/ovs-lib
     sed -i '/chown -R $INSTALL_USER:$INSTALL_GROUP $ovn_etcdir/d' $out/share/ovn/scripts/ovn-ctl
+
+    mkdir -vp $out/share/openvswitch/scripts
+    ln -s ${openvswitch}/share/openvswitch/scripts/ovs-lib $out/share/openvswitch/scripts/ovs-lib
+
+    wrapProgram $out/share/ovn/scripts/ovn-ctl \
+      --prefix PATH : ${lib.makeBinPath [ openvswitch ]}
   '';
 
   env = {