1 files changed, 9 insertions, 11 deletions
diff --git a/pkgs/build-support/rust/build-rust-package/default.nix b/pkgs/build-support/rust/build-rust-package/default.nix
index 9b2e62fc240..cf2ddbd084b 100644
--- a/pkgs/build-support/rust/build-rust-package/default.nix
+++ b/pkgs/build-support/rust/build-rust-package/default.nix
@@ -1,7 +1,6 @@
 { lib
 , importCargoLock
 , fetchCargoTarball
-, rust
 , stdenv
 , callPackage
 , cargoBuildHook
@@ -62,7 +61,6 @@
 assert cargoVendorDir == null && cargoLock == null
     -> !(args ? cargoSha256 && args.cargoSha256 != null) && !(args ? cargoHash && args.cargoHash != null)
     -> throw "cargoSha256, cargoHash, cargoVendorDir, or cargoLock must be set";
-assert buildType == "release" || buildType == "debug";
 
 let
 
@@ -79,18 +77,13 @@ let
       sha256 = args.cargoSha256;
     } // depsExtraArgs);
 
-  target = rust.toRustTargetSpec stdenv.hostPlatform;
+  target = stdenv.hostPlatform.rust.rustcTargetSpec;
   targetIsJSON = lib.hasSuffix ".json" target;
   useSysroot = targetIsJSON && !__internal_dontAddSysroot;
 
-  # see https://github.com/rust-lang/cargo/blob/964a16a28e234a3d397b2a7031d4ab4a428b1391/src/cargo/core/compiler/compile_kind.rs#L151-L168
-  # the "${}" is needed to transform the path into a /nix/store path before baseNameOf
-  shortTarget = if targetIsJSON then
-      (lib.removeSuffix ".json" (builtins.baseNameOf "${target}"))
-    else target;
-
   sysroot = callPackage ./sysroot { } {
-    inherit target shortTarget;
+    inherit target;
+    shortTarget = stdenv.hostPlatform.rust.cargoShortTarget;
     RUSTFLAGS = args.RUSTFLAGS or "";
     originalCargoToml = src + /Cargo.toml; # profile info is later extracted
   };
@@ -162,10 +155,15 @@ stdenv.mkDerivation ((removeAttrs args [ "depsExtraArgs" "cargoUpdateHook" "carg
       # Platforms without host tools from
       # https://doc.rust-lang.org/nightly/rustc/platform-support.html
       "armv7a-darwin"
-      "armv5tel-linux" "armv7a-linux" "m68k-linux" "riscv32-linux"
+      "armv5tel-linux" "armv7a-linux" "m68k-linux" "mipsel-linux"
+      "mips64el-linux" "riscv32-linux"
       "armv6l-netbsd"
       "x86_64-redox"
       "wasm32-wasi"
     ];
+    badPlatforms = [
+      # Rust is currently unable to target the n32 ABI
+      lib.systems.inspect.patterns.isMips64n32
+    ];
   } // meta;
 })