* Make the garbage collector do the right thing when `gc-keep-outputs'

is enabled by not depending on the deriver.

src/libstore/store-api.cc

@@ -1,6 +1,7 @@
 #include "store-api.hh"
 #include "globals.hh"
 #include "util.hh"
+#include "derivations.hh"
 
 #include <limits.h>
 
@@ -52,6 +53,18 @@ Path toStorePath(const Path & path)
 }
 
 
+string getNameOfStorePath(const Path & path)
+{
+    Path::size_type slash = path.rfind('/');
+    string p = slash == Path::npos ? path : string(path, slash + 1);
+    Path::size_type dash = p.find('-');
+    assert(dash != Path::npos);
+    string p2 = string(p, dash + 1);
+    if (isDerivation(p2)) p2 = string(p2, 0, p2.size() - 4);
+    return p2;
+}
+
+
 Path followLinksToStore(const Path & _path)
 {
     Path path = absPath(_path);