Work around https://github.com/NixOS/nix/pull/8484

Let's work around it downstream while we wait for a release.

Fixes #56.

attic/Cargo.toml

@@ -45,6 +45,7 @@ tokio-test = "0.4.2"
 [build-dependencies]
 cxx-build = { version = "1.0", optional = true }
 pkg-config = "0.3.27"
+tempfile = "3"
 
 [features]
 default = [ "nix_store", "tokio" ]

attic/build.rs

@@ -9,12 +9,23 @@ fn main() {
 
 #[cfg(feature = "nix_store")]
 fn build_bridge() {
+    // Temporary workaround for issue in <https://github.com/NixOS/nix/pull/8484>
+    let hacky_include = {
+        let dir = tempfile::tempdir()
+            .expect("Failed to create temporary directory for workaround");
+        std::fs::write(dir.path().join("uds-remote-store.md"), "\"\"")
+            .unwrap();
+        dir
+    };
+
     cxx_build::bridge("src/nix_store/bindings/mod.rs")
         .file("src/nix_store/bindings/nix.cpp")
         .flag("-std=c++17")
         .flag("-O2")
         .flag("-include")
         .flag("nix/config.h")
+        .flag("-idirafter")
+        .flag(hacky_include.path().to_str().unwrap())
         .compile("nixbinding");
 
     println!("cargo:rerun-if-changed=src/nix_store/bindings");