diff --git a/pkgs/by-name/tr/tree-from-tags/gemset.nix b/pkgs/by-name/tr/tree-from-tags/gemset.nix
index 67fd0af05823..4bfa217b1776 100644
--- a/pkgs/by-name/tr/tree-from-tags/gemset.nix
+++ b/pkgs/by-name/tr/tree-from-tags/gemset.nix
@@ -2,7 +2,7 @@
   taglib-ruby = {
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0r8g7zdncc6243d000jn0grc1n70rn9mx16vggy3q7c4wgsa37xi";
+      hash = "sha256-sZ+h9OOEHTz8e9uEXpPN4NjA8gNWAgDaIMIwZts/D2U=";
       type = "gem";
     };
     version = "0.7.1";
diff --git a/pkgs/by-name/tr/tree-from-tags/package.nix b/pkgs/by-name/tr/tree-from-tags/package.nix
index 05d8af544857..0a8b810d7bf5 100644
--- a/pkgs/by-name/tr/tree-from-tags/package.nix
+++ b/pkgs/by-name/tr/tree-from-tags/package.nix
@@ -16,37 +16,40 @@ in
 stdenv.mkDerivation {
   pname = "tree-from-tags";
   inherit version;
+
   src = fetchFromGitHub {
     owner = "dbrock";
     repo = "bongo";
     rev = version;
-    sha256 = "1nszph9mn98flyhn1jq3y6mdh6jymjkvj5ng36ql016dj92apvhv";
+    hash = "sha256-G+6rRJLNBECxGc8WuaesXhrYqvEDy2Chpw4lWxO8X9s=";
   };
+
   buildInputs = [
     gems
     ruby
   ];
+
   installPhase = ''
-        mkdir -p $out/{bin,share}
-        cp tree-from-tags.rb $out/share/
-        bin=$out/bin/tree-from-tags
+    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
+    cat > $bin <<EOF
     #!/bin/sh -e
     exec ${gems}/bin/bundle exec ${ruby}/bin/ruby "$out"/share/tree-from-tags.rb "\$@"
     EOF
-        chmod +x $bin
+    chmod +x $bin
   '';
 
-  meta = with lib; {
+  meta = {
     description = "Create file hierarchies from media tags";
     homepage = "https://www.emacswiki.org/emacs/Bongo";
-    platforms = ruby.meta.platforms;
-    maintainers = [
-      maintainers.livnev
-      maintainers.dbrock
+    platforms = lib.ruby.meta.platforms;
+    maintainers = with lib.maintainers; [
+      livnev
+      dbrock
     ];
-    license = licenses.gpl2Plus;
+    license = lib.licenses.gpl2Plus;
     mainProgram = "tree-from-tags";
   };
 }