* Install the worker in bindir, not libexecdir.

* Allow the worker path to be overriden through the NIX_WORKER
  environment variable.

src/libstore/globals.cc

@@ -15,6 +15,7 @@ string nixStateDir = "/UNINIT";
 string nixDBPath = "/UNINIT";
 string nixConfDir = "/UNINIT";
 string nixLibexecDir = "/UNINIT";
+string nixBinDir = "/UNINIT";
 
 bool keepFailed = false;
 bool keepGoing = false;

src/libstore/globals.hh

@@ -32,6 +32,9 @@ extern string nixConfDir;
    stored. */
 extern string nixLibexecDir;
 
+/* nixBinDir is the directory where the main programs are stored. */
+extern string nixBinDir;
+
 
 /* Misc. global flags. */
 

src/libstore/remote-store.cc

@@ -3,6 +3,7 @@
 #include "remote-store.hh"
 #include "worker-protocol.hh"
 #include "archive.hh"
+#include "globals.hh"
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -27,7 +28,9 @@ RemoteStore::RemoteStore()
 
     
     /* Start the worker. */
-    string worker = "nix-worker";
+    Path worker = getEnv("NIX_WORKER");
+    if (worker == "")
+        worker = nixBinDir + "/nix-worker";
 
     child = fork();