diff --git a/pkgs/tools/package-management/licensee/Gemfile b/pkgs/tools/package-management/licensee/Gemfile
new file mode 100644
index 000000000000..a5d0dacfcfae
--- /dev/null
+++ b/pkgs/tools/package-management/licensee/Gemfile
@@ -0,0 +1,2 @@
+source 'https://rubygems.org'
+gem 'licensee'
diff --git a/pkgs/tools/package-management/licensee/Gemfile.lock b/pkgs/tools/package-management/licensee/Gemfile.lock
new file mode 100644
index 000000000000..00d62361e697
--- /dev/null
+++ b/pkgs/tools/package-management/licensee/Gemfile.lock
@@ -0,0 +1,38 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    dotenv (2.7.6)
+    faraday (1.0.1)
+      multipart-post (>= 1.2, < 3)
+    licensee (9.14.0)
+      dotenv (~> 2.0)
+      octokit (~> 4.17)
+      reverse_markdown (~> 1.0)
+      rugged (~> 0.24)
+      thor (>= 0.19, < 2.0)
+    mini_portile2 (2.4.0)
+    multipart-post (2.1.1)
+    nokogiri (1.10.10)
+      mini_portile2 (~> 2.4.0)
+    octokit (4.18.0)
+      faraday (>= 0.9)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    public_suffix (4.0.5)
+    reverse_markdown (1.4.0)
+      nokogiri
+    rugged (0.99.0)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
+    thor (1.0.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  licensee
+
+BUNDLED WITH
+   2.1.4
diff --git a/pkgs/tools/package-management/licensee/default.nix b/pkgs/tools/package-management/licensee/default.nix
new file mode 100644
index 000000000000..fb33f498bbc3
--- /dev/null
+++ b/pkgs/tools/package-management/licensee/default.nix
@@ -0,0 +1,17 @@
+{ lib, bundlerApp, bundlerUpdateScript }:
+
+bundlerApp {
+  pname = "licensee";
+  gemdir = ./.;
+  exes = [ "licensee" ];
+
+  passthru.updateScript = bundlerUpdateScript "licensee";
+
+  meta = with lib; {
+    description = "A Ruby Gem to detect under what license a project is distributed";
+    homepage    = "https://licensee.github.io/licensee/";
+    license     = licenses.mit;
+    maintainers = [ maintainers.sternenseemann ];
+    platforms   = platforms.unix;
+  };
+}
diff --git a/pkgs/tools/package-management/licensee/gemset.nix b/pkgs/tools/package-management/licensee/gemset.nix
new file mode 100644
index 000000000000..b3b326f6b317
--- /dev/null
+++ b/pkgs/tools/package-management/licensee/gemset.nix
@@ -0,0 +1,139 @@
+{
+  addressable = {
+    dependencies = ["public_suffix"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1fvchp2rhp2rmigx7qglf69xvjqvzq7x0g49naliw29r2bz656sy";
+      type = "gem";
+    };
+    version = "2.7.0";
+  };
+  dotenv = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0iym172c5337sm1x2ykc2i3f961vj3wdclbyg1x6sxs3irgfsl94";
+      type = "gem";
+    };
+    version = "2.7.6";
+  };
+  faraday = {
+    dependencies = ["multipart-post"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0wwks9652xwgjm7yszcq5xr960pjypc07ivwzbjzpvy9zh2fw6iq";
+      type = "gem";
+    };
+    version = "1.0.1";
+  };
+  licensee = {
+    dependencies = ["dotenv" "octokit" "reverse_markdown" "rugged" "thor"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1mv7khv080p81x6indb5akr2a1x84l2xy96a6bziw207291lxx7p";
+      type = "gem";
+    };
+    version = "9.14.0";
+  };
+  mini_portile2 = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "15zplpfw3knqifj9bpf604rb3wc1vhq6363pd6lvhayng8wql5vy";
+      type = "gem";
+    };
+    version = "2.4.0";
+  };
+  multipart-post = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1zgw9zlwh2a6i1yvhhc4a84ry1hv824d6g2iw2chs3k5aylpmpfj";
+      type = "gem";
+    };
+    version = "2.1.1";
+  };
+  nokogiri = {
+    dependencies = ["mini_portile2"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0xmf60nj5kg9vaj5bysy308687sgmkasgx06vbbnf94p52ih7si2";
+      type = "gem";
+    };
+    version = "1.10.10";
+  };
+  octokit = {
+    dependencies = ["faraday" "sawyer"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0zvfr9njmj5svi39fcsi2b0g7pcxb0vamw9dlyas8bg814jlzhi6";
+      type = "gem";
+    };
+    version = "4.18.0";
+  };
+  public_suffix = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0vywld400fzi17cszwrchrzcqys4qm6sshbv73wy5mwcixmrgg7g";
+      type = "gem";
+    };
+    version = "4.0.5";
+  };
+  reverse_markdown = {
+    dependencies = ["nokogiri"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0w786j869fjhjf72waj0hc9i4ghi45b78a2am27kij4sa2hmsc53";
+      type = "gem";
+    };
+    version = "1.4.0";
+  };
+  rugged = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "04rkxwzaa6897da3mnm70g720gpxwyh71krfn6ag1dkk80x8a8yz";
+      type = "gem";
+    };
+    version = "0.99.0";
+  };
+  sawyer = {
+    dependencies = ["addressable" "faraday"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0yrdchs3psh583rjapkv33mljdivggqn99wkydkjdckcjn43j3cz";
+      type = "gem";
+    };
+    version = "0.8.2";
+  };
+  thor = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1xbhkmyhlxwzshaqa7swy2bx6vd64mm0wrr8g3jywvxy7hg0cwkm";
+      type = "gem";
+    };
+    version = "1.0.1";
+  };
+}
\ No newline at end of file
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 868639586be2..f62212935f5a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5078,6 +5078,8 @@ in
     libwebsockets_4_0;
   libwebsockets = libwebsockets_3_2;
 
+  licensee = callPackage ../tools/package-management/licensee { };
+
   lidarr = callPackage ../servers/lidarr { };
 
   limesuite = callPackage ../applications/radio/limesuite { };