diff --git a/nix/rust.nix b/nix/rust.nix
index bba2a57..aee4c3c 100644
--- a/nix/rust.nix
+++ b/nix/rust.nix
@@ -2,6 +2,6 @@
 
 let
   pkgs = import sources.nixpkgs { overlays = [ (import sources.nixpkgs-mozilla) ]; };
-  date = "2020-02-14";
+  date = "2020-02-28";
 in
   pkgs.rustChannelOf { inherit date; channel = "nightly"; }
diff --git a/nix/sources.json b/nix/sources.json
index af8eea7..32140aa 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "",
         "owner": "nmattia",
         "repo": "naersk",
-        "rev": "9a71dbed3c33b2faa57b2fb05ae9cfd563bd6c2c",
-        "sha256": "1bgkmfdkf3vsxk16vfv2j14xb1sk7idswqd8iai5lwqq7lxq3cna",
+        "rev": "ee15d1214a8fb58967a24d629062e4ccdd9a925a",
+        "sha256": "1x5yjbizwvsqrwvfjaljd6wsfmd3ijvw2zgk89545nipqi5ibx7b",
         "type": "tarball",
-        "url": "https://github.com/nmattia/naersk/archive/9a71dbed3c33b2faa57b2fb05ae9cfd563bd6c2c.tar.gz",
+        "url": "https://github.com/nmattia/naersk/archive/ee15d1214a8fb58967a24d629062e4ccdd9a925a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "niv": {
diff --git a/pneuma.nix b/pneuma.nix
index 57c0186..031a4a4 100644
--- a/pneuma.nix
+++ b/pneuma.nix
@@ -12,4 +12,5 @@ naersk.buildPackage {
     (path: type: type != "directory" || builtins.baseNameOf path != "target")
     ./.;
   doCheck = false;
+  remapPathPrefix = true;
 }