required for network-sandbox

--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,8 +1,8 @@
 [patch.crates-io]
-cxx = { package = "cxx", git = "https://github.com/facebookexperimental/cxx.git", rev = "870ebbecad0f6be394d4f9fb9bd62b551662651a" }
-cxx-build = { package = "cxx-build", git = "https://github.com/facebookexperimental/cxx.git", rev = "870ebbecad0f6be394d4f9fb9bd62b551662651a" }
-displaydoc = { git = "https://github.com/yaahc/displaydoc", rev = "7dc6e324b1788a6b7fb9f3a1953c512923a3e9f0" }
-quickcheck = { git = "https://github.com/jakoschiko/quickcheck", rev = "6ecdf5bb4b0132ce66670b4d46453aa022ea892c" }
+cxx = { package = "cxx", path = "../cxx-870ebbecad0f6be394d4f9fb9bd62b551662651a" }
+cxx-build = { package = "cxx-build", path = "../cxx-870ebbecad0f6be394d4f9fb9bd62b551662651a/gen/build" }
+displaydoc = { path = "../displaydoc-7dc6e324b1788a6b7fb9f3a1953c512923a3e9f0" }
+quickcheck = { path = "../quickcheck-6ecdf5bb4b0132ce66670b4d46453aa022ea892c" }
 
 [profile.release]
 lto = true