diff --git a/pkgs/development/tools/reflex/default.nix b/pkgs/development/tools/reflex/default.nix
new file mode 100644
index 000000000000..3e69b4ffa073
--- /dev/null
+++ b/pkgs/development/tools/reflex/default.nix
@@ -0,0 +1,24 @@
+{ lib, fetchFromGitHub, buildGoPackage }:
+
+
+buildGoPackage rec {
+  name = "reflex-${version}";
+  version = "0.2.0";
+
+  goPackagePath = "github.com/cespare/reflex";
+
+  src = fetchFromGitHub {
+    owner = "cespare";
+    repo = "reflex";
+    rev = "v${version}";
+    sha256 = "0ccwjmf8rjh03hpbmfiy70ai9dhgvb5vp7albffq0cmv2sl69dqr";
+  };
+
+  meta = with lib; {
+    description = "A small tool to watch a directory and rerun a command when certain files change";
+    homepage = https://github.com/cespare/reflex;
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ nicknovitski ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 730e05255cb4..7f96686879a3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4418,6 +4418,8 @@ with pkgs;
 
   recoll = callPackage ../applications/search/recoll { };
 
+  reflex = callPackage ../development/tools/reflex { };
+
   reiser4progs = callPackage ../tools/filesystems/reiser4progs { };
 
   reiserfsprogs = callPackage ../tools/filesystems/reiserfsprogs { };