Moved 'noise' to seperate derivation

noise.nix

@@ -0,0 +1,37 @@
+{
+  scdoc,
+  stdenvNoCC,
+  nushell,
+  mpc-cli,
+}:
+stdenvNoCC.mkDerivation {
+  pname = "noise";
+  version = "0.6";
+  src = ./src/noise;
+  nativeBuildInputs = [
+    scdoc
+    nushell
+  ];
+
+  buildPhase = ''
+    for page in $(find manpages -type f); do
+      scdoc < $page > $(basename $page .scd)
+    done
+    export dontPatchShebangs=1
+  '';
+
+  installPhase = ''
+    mkdir -p $out/{share/man/man1,bin,share/zsh/site-functions}
+    cp bin/* $out/bin/
+    cp completions/* $out/share/zsh/site-functions/
+    cp *.1 $out/share/man/man1/
+
+    runHook postInstall
+  '';
+
+  postInstall = ''
+    substituteInPlace $out/bin/* \
+    --replace "mpc " "${mpc-cli}/bin/mpc "
+  '';
+
+}