chv: improve derivation build

We now have much more explicit control over the compilation options, independent
of what Cloud Hypervisor's Cargo.toml defines in its Cargo.toml. Further, this
does some cleanup to prepare the upgrade to v50, which requires a few minor
changes in how Cloud Hypervisor is build.

On-behalf-of: SAP philipp.schuster@sap.com
Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>

Author: phip1611

chv.nix

@@ -15,9 +15,8 @@ let
   craneLib' = craneLib.overrideToolchain rustToolchain;
 
   commonArgs = {
-    meta = cloud-hypervisor-meta;
-
     src = craneLib'.cleanCargoSource cloud-hypervisor-src;
+    meta = cloud-hypervisor-meta;
 
     # Pragmatic release profile with debug-ability and faster
     # compilation times in mind.
@@ -44,8 +43,6 @@ let
   cargoArtifacts = craneLib'.buildDepsOnly (
     commonArgs
     // {
-      # "suffix '-deps' will be appended
-      pname = "cloud-hypervisor";
       doCheck = false;
     }
   );
@@ -54,8 +51,7 @@ let
     commonArgs
     // {
       inherit cargoArtifacts;
-      pname = "cloud-hypervisor";
-      # Don't execute tests here. We want this in a dedicated step.
+      # Don't execute unit tests here.
       doCheck = false;
       cargoExtraArgs = "--features kvm";
     }