parameterize rustcSrc

pkgs/development/compilers/rust/rust-src.nix

@@ -1,4 +1,4 @@
-{ stdenv, rustc }:
+{ lib, stdenv, rustc, minimalContent ? true }:
 
 stdenv.mkDerivation {
   name = "rust-src";
@@ -6,6 +6,9 @@ stdenv.mkDerivation {
   phases = [ "unpackPhase" "installPhase" ];
   installPhase = ''
     mv src $out
-    rm -rf $out/{ci,doc,etc,grammar,llvm-project,llvm-emscripten,rtstartup,rustllvm,test,vendor}
+    rm -rf $out/{${if minimalContent
+      then "ci,doc,etc,grammar,llvm-project,llvm-emscripten,rtstartup,rustllvm,test,tools,vendor,stdarch"
+      else "ci,doc,etc,grammar,llvm-project,llvm-emscripten,rtstartup,rustllvm,test,vendor"
+    }}
   '';
 }