diff --git a/pkgs/tools/misc/loop/default.nix b/pkgs/tools/misc/loop/default.nix
index acb88d9773c89..501ab664f83ff 100644
--- a/pkgs/tools/misc/loop/default.nix
+++ b/pkgs/tools/misc/loop/default.nix
@@ -1,23 +1,17 @@
 { stdenv, fetchFromGitHub, rustPlatform }:
 
 rustPlatform.buildRustPackage {
-  name = "loop-unstable-2018-10-02";
+  name = "loop-unstable-2018-12-04";
 
   src = fetchFromGitHub {
     owner = "Miserlou";
     repo  = "Loop";
-    rev   = "d6ef3c5a0ecd4f533908abee5e481419a1a6eeae";
-    sha256 = "1fhihm32v77rj6r3scwmnvzsivky50g7a1644qrn8pafpjs4zwx5";
+    rev   = "598ccc8e52bb13b8aff78b61cfe5b10ff576cecf";
+    sha256 = "0f33sc1slg97q1aisdrb465c3p7fgdh2swv8k3yphpnja37f5nl4";
   };
 
   cargoSha256 = "1ccf8dkswwdbwf9diy0l4vc4i2g05ynhi3w1jg3b2ldrvj0j9m9s";
 
-  cargoPatches = [
-    # Upstream includes mismatched Cargo.lock file.
-    # See https://github.com/Miserlou/Loop/pull/40
-    ./fix_cargo_lock.patch
-  ];
-
   meta = with stdenv.lib; {
     description = "UNIX's missing `loop` command";
     homepage = https://github.com/Miserlou/Loop;
diff --git a/pkgs/tools/misc/loop/fix_cargo_lock.patch b/pkgs/tools/misc/loop/fix_cargo_lock.patch
deleted file mode 100644
index f991a604f336b..0000000000000
--- a/pkgs/tools/misc/loop/fix_cargo_lock.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/Cargo.lock b/Cargo.lock
---- a/Cargo.lock
-+++ b/Cargo.lock
-@@ -107,7 +107,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
-
- [[package]]
- name = "loop-rs"
--version = "0.3.5"
-+version = "0.4.0"
- dependencies = [
-  "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
-  "humantime 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",