cratesDownloadUrl

README.md

@@ -232,6 +232,7 @@ process, rest is passed-through into `mkDerivation`.
 | `root` | Used by `naersk` to read the `Cargo.toml` and `Cargo.lock` files. May be different from `src`. When `src` is not set, `root` is (indirectly) used as `src`. |
 | `gitAllRefs` | Whether to fetch all refs while fetching Git dependencies. Useful if the wanted revision isn't in the default branch. Requires Nix 2.4+. Default: `false` |
 | `gitSubmodules` | Whether to fetch submodules while fetching Git dependencies. Requires Nix 2.4+. Default: `false` |
+| `cratesDownloadUrl` | Url for downloading crates from an alternative source Default: `"https://crates.io"` |
 | `cargoBuild` | The command to use for the build. The argument must be a function modifying the default value. <br/> Default: `''cargo $cargo_options build $cargo_build_options >> $cargo_build_output_json''` |
 | `cargoBuildOptions` | Options passed to cargo build, i.e. `cargo build <OPTS>`. These options can be accessed during the build through the environment variable `cargo_build_options`. <br/> Note: naersk relies on the `--out-dir out` option and the `--message-format` option. The `$cargo_message_format` variable is set based on the cargo version.<br/> Note: these values are not (shell) escaped, meaning that you can use environment variables but must be careful when introducing e.g. spaces. <br/> The argument must be a function modifying the default value. <br/> Default: `[ "$cargo_release" ''-j "$NIX_BUILD_CORES"'' "--message-format=$cargo_message_format" ]` |
 | `remapPathPrefix` | When `true`, rustc remaps the (`/nix/store`) source paths to `/sources` to reduce the number of dependencies in the closure. Default: `true` |

build.nix

@@ -1,4 +1,6 @@
 { src
+  #| From where the crates should be downloaded
+, cratesDownloadUrl
   #| What command to run during the build phase
 , cargoCommand
 , cargoBuildOptions
@@ -389,7 +391,7 @@ let
       crate = fetchurl {
         inherit sha256;
 
-        url = "https://crates.io/api/v1/crates/${name}/${version}/download";
+        url = "${cratesDownloadUrl}/api/v1/crates/${name}/${version}/download";
         name = "download-${name}-${version}";
       };
 

config.nix

@@ -37,6 +37,9 @@ let
     # 2.4+.
     gitSubmodules = attrs0.gitSubmodules or false;
 
+    # Url for downloading crates from an alternative source
+    cratesDownloadUrl = attrs0.cratesDownloadUrl or "https://crates.io";
+
     # The command to use for the build.
     cargoBuild =
       allowFun attrs0 "cargoBuild"
@@ -259,6 +262,7 @@ let
       cargoOptions
       compressTarget
       mode
+      cratesDownloadUrl
 
       cargoBuildOptions
       remapPathPrefix