1 files changed, 7 insertions, 0 deletions
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index 23360de2e..fce3cab8d 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -30,6 +30,10 @@ struct Sink;
 struct Source;
 
 
+/* The system for which Nix is compiled. */
+extern const std::string nativeSystem;
+
+
 /* Return an environment variable. */
 string getEnv(const string & key, const string & def = "");
 
@@ -263,6 +267,9 @@ string runProgram(Path program, bool searchPath = false,
 
 struct RunOptions
 {
+    std::optional<uid_t> uid;
+    std::optional<uid_t> gid;
+    std::optional<Path> chdir;
     Path program;
     bool searchPath = true;
     Strings args;