diff --git a/pkgs/by-name/tr/tree-from-tags/gemset.nix b/pkgs/by-name/tr/tree-from-tags/gemset.nix
index f482d174ebc2..67fd0af05823 100644
--- a/pkgs/by-name/tr/tree-from-tags/gemset.nix
+++ b/pkgs/by-name/tr/tree-from-tags/gemset.nix
@@ -1,7 +1,7 @@
 {
   taglib-ruby = {
     source = {
-      remotes = ["https://rubygems.org"];
+      remotes = [ "https://rubygems.org" ];
       sha256 = "0r8g7zdncc6243d000jn0grc1n70rn9mx16vggy3q7c4wgsa37xi";
       type = "gem";
     };
diff --git a/pkgs/by-name/tr/tree-from-tags/package.nix b/pkgs/by-name/tr/tree-from-tags/package.nix
index 9b81cc250c1b..05d8af544857 100644
--- a/pkgs/by-name/tr/tree-from-tags/package.nix
+++ b/pkgs/by-name/tr/tree-from-tags/package.nix
@@ -1,38 +1,51 @@
-{ lib, stdenv, bundlerEnv, ruby, fetchFromGitHub }:
+{
+  lib,
+  stdenv,
+  bundlerEnv,
+  ruby,
+  fetchFromGitHub,
+}:
 let
   version = "1.1";
   gems = bundlerEnv {
     name = "tree-from-tags-${version}-gems";
     inherit ruby;
-    gemdir  = ./.;
+    gemdir = ./.;
   };
-in stdenv.mkDerivation {
+in
+stdenv.mkDerivation {
   pname = "tree-from-tags";
   inherit version;
   src = fetchFromGitHub {
-    owner  = "dbrock";
-    repo   = "bongo";
-    rev    = version;
+    owner = "dbrock";
+    repo = "bongo";
+    rev = version;
     sha256 = "1nszph9mn98flyhn1jq3y6mdh6jymjkvj5ng36ql016dj92apvhv";
   };
-  buildInputs = [ gems ruby ];
+  buildInputs = [
+    gems
+    ruby
+  ];
   installPhase = ''
-    mkdir -p $out/{bin,share}
-    cp tree-from-tags.rb $out/share/
-    bin=$out/bin/tree-from-tags
-# we are using bundle exec to start in the bundled environment
-    cat > $bin <<EOF
-#!/bin/sh -e
-exec ${gems}/bin/bundle exec ${ruby}/bin/ruby "$out"/share/tree-from-tags.rb "\$@"
-EOF
-    chmod +x $bin
+        mkdir -p $out/{bin,share}
+        cp tree-from-tags.rb $out/share/
+        bin=$out/bin/tree-from-tags
+    # we are using bundle exec to start in the bundled environment
+        cat > $bin <<EOF
+    #!/bin/sh -e
+    exec ${gems}/bin/bundle exec ${ruby}/bin/ruby "$out"/share/tree-from-tags.rb "\$@"
+    EOF
+        chmod +x $bin
   '';
 
   meta = with lib; {
     description = "Create file hierarchies from media tags";
     homepage = "https://www.emacswiki.org/emacs/Bongo";
     platforms = ruby.meta.platforms;
-    maintainers = [ maintainers.livnev maintainers.dbrock ];
+    maintainers = [
+      maintainers.livnev
+      maintainers.dbrock
+    ];
     license = licenses.gpl2Plus;
     mainProgram = "tree-from-tags";
   };