Create a transcoder crate

shell.nix

@@ -1,4 +1,5 @@
 {pkgs ? import <nixpkgs> {}}: let
+  pwd = ./.;
   venvDir = "./scanner/.venv";
   pythonPkgs = ./scanner/requirements.txt;
 in
@@ -13,18 +14,23 @@ in
         ])
       python3
       python3Packages.pip
+      cargo
+      rustfmt
+      rustc
     ];
 
+    RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+
     shellHook = ''
-    # Install python modules
-    SOURCE_DATE_EPOCH=$(date +%s)
-    if [ ! -d "${venvDir}" ]; then
-        ${pkgs.python3}/bin/python3 -m venv ${venvDir}
-        source ${venvDir}/bin/activate
-        export PIP_DISABLE_PIP_VERSION_CHECK=1
-        pip install -r ${pythonPkgs} >&2
-    else
-        source ${venvDir}/bin/activate
-    fi
+      # Install python modules
+      SOURCE_DATE_EPOCH=$(date +%s)
+      if [ ! -d "${venvDir}" ]; then
+          ${pkgs.python3}/bin/python3 -m venv ${pwd}/${venvDir}
+          source ${venvDir}/bin/activate
+          export PIP_DISABLE_PIP_VERSION_CHECK=1
+          pip install -r ${pythonPkgs} >&2
+      else
+          source ${venvDir}/bin/activate
+      fi
     '';
   }