diff --git a/pkgs/tools/misc/loop/default.nix b/pkgs/tools/misc/loop/default.nix
new file mode 100644
index 000000000000..acb88d9773c8
--- /dev/null
+++ b/pkgs/tools/misc/loop/default.nix
@@ -0,0 +1,27 @@
+{ stdenv, fetchFromGitHub, rustPlatform }:
+
+rustPlatform.buildRustPackage {
+  name = "loop-unstable-2018-10-02";
+
+  src = fetchFromGitHub {
+    owner = "Miserlou";
+    repo  = "Loop";
+    rev   = "d6ef3c5a0ecd4f533908abee5e481419a1a6eeae";
+    sha256 = "1fhihm32v77rj6r3scwmnvzsivky50g7a1644qrn8pafpjs4zwx5";
+  };
+
+  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;
+    maintainers = with maintainers; [ koral ];
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/tools/misc/loop/fix_cargo_lock.patch b/pkgs/tools/misc/loop/fix_cargo_lock.patch
new file mode 100644
index 000000000000..f991a604f336
--- /dev/null
+++ b/pkgs/tools/misc/loop/fix_cargo_lock.patch
@@ -0,0 +1,12 @@
+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)",
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5ef3d430b137..c4354acf0ca8 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22187,6 +22187,8 @@ in
 
   openlilylib-fonts = callPackage ../misc/lilypond/fonts.nix { };
 
+  loop = callPackage ../tools/misc/loop { };
+
   mailcore2 = callPackage ../development/libraries/mailcore2 {
     icu = icu58;
   };