Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: doing 0 -> 1
attrpath: doing
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/5ck21yn5gka1ldani9ky64y55w2hy4fv-packages.json.drv
building '/nix/store/5ck21yn5gka1ldani9ky64y55w2hy4fv-packages.json.drv'...

Going to be running update for following packages:
 - doing-2.1.88

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - doing-2.1.88: UPDATING ...
 - doing-2.1.88: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/do/doing/Gemfile.lock b/pkgs/by-name/do/doing/Gemfile.lock
index 285a38250cfd..da9effca4a69 100644
--- a/pkgs/by-name/do/doing/Gemfile.lock
+++ b/pkgs/by-name/do/doing/Gemfile.lock
@@ -1,11 +1,11 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    base64 (0.2.0)
+    base64 (0.3.0)
     chronic (0.10.2)
-    csv (3.3.2)
+    csv (3.3.5)
     deep_merge (1.2.2)
-    doing (2.1.88)
+    doing (2.1.105)
       base64 (~> 0.2)
       chronic (~> 0.10, >= 0.10.2)
       csv (~> 3.3)
@@ -29,27 +29,27 @@ GEM
     haml (5.0.4)
       temple (>= 0.8.0)
       tilt
-    io-console (0.8.0)
-    kramdown (2.5.1)
-      rexml (>= 3.3.9)
-    logger (1.6.6)
-    ostruct (0.6.1)
+    io-console (0.8.2)
+    kramdown (2.5.2)
+      rexml (>= 3.4.4)
+    logger (1.7.0)
+    ostruct (0.6.3)
     parslet (2.0.0)
     pastel (0.8.0)
       tty-color (~> 0.5)
     plist (3.7.2)
-    reline (0.6.0)
+    reline (0.6.3)
       io-console (~> 0.5)
-    rexml (3.4.1)
-    rouge (4.5.1)
+    rexml (3.4.4)
+    rouge (4.7.0)
     safe_yaml (1.0.5)
     strings (0.2.1)
       strings-ansi (~> 0.2)
       unicode-display_width (>= 1.5, < 3.0)
       unicode_utils (~> 1.4)
     strings-ansi (0.2.0)
-    temple (0.10.3)
-    tilt (2.6.0)
+    temple (0.10.4)
+    tilt (2.7.0)
     tty-color (0.6.0)
     tty-cursor (0.7.1)
     tty-link (0.2.0)
@@ -82,4 +82,4 @@ DEPENDENCIES
   doing
 
 BUNDLED WITH
-   2.5.22
+   2.7.2
diff --git a/pkgs/by-name/do/doing/gemset.nix b/pkgs/by-name/do/doing/gemset.nix
index a7afc6c23117..0b0755a2c560 100644
--- a/pkgs/by-name/do/doing/gemset.nix
+++ b/pkgs/by-name/do/doing/gemset.nix
@@ -4,10 +4,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "01qml0yilb9basf7is2614skjp8384h2pycfx86cr8023arfj98g";
+      sha256 = "0yx9yn47a8lkfcjmigk79fykxvr80r4m1i35q82sxzynpbm7lcr7";
       type = "gem";
     };
-    version = "0.2.0";
+    version = "0.3.0";
   };
   chronic = {
     groups = [ "default" ];
@@ -24,10 +24,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0kmx36jjh2sahd989vcvw74lrlv07dqc3rnxchc5sj2ywqsw3w3g";
+      sha256 = "0gz7r2kazwwwyrwi95hbnhy54kwkfac5swh2gy5p5vw36fn38lbf";
       type = "gem";
     };
-    version = "3.3.2";
+    version = "3.3.5";
   };
   deep_merge = {
     groups = [ "default" ];
@@ -64,10 +64,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1ssnswvwyhszc63b7mkrb7scjlh4j96z101ln1qwjlljic0h0yjp";
+      sha256 = "044ahhd132i9gck2pvlxv71qkxncmg0dd6wiysipb9m7zcc2s6v8";
       type = "gem";
     };
-    version = "2.1.88";
+    version = "2.1.105";
   };
   gli = {
     dependencies = [ "ostruct" ];
@@ -99,10 +99,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "18pgvl7lfjpichdfh1g50rpz0zpaqrpr52ybn9liv1v9pjn9ysnd";
+      sha256 = "1k0lk3pwadm2myvpg893n8jshmrf2sigrd4ki15lymy7gixaxqyn";
       type = "gem";
     };
-    version = "0.8.0";
+    version = "0.8.2";
   };
   kramdown = {
     dependencies = [ "rexml" ];
@@ -110,30 +110,30 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "131nwypz8b4pq1hxs6gsz3k00i9b75y3cgpkq57vxknkv6mvdfw7";
+      sha256 = "1yh2gwpwhh0p4vc0aabzn0hb55av0wkcq3gh3w8zkdk69hh4598v";
       type = "gem";
     };
-    version = "2.5.1";
+    version = "2.5.2";
   };
   logger = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "05s008w9vy7is3njblmavrbdzyrwwc1fsziffdr58w9pwqj8sqfx";
+      sha256 = "00q2zznygpbls8asz5knjvvj2brr3ghmqxgr83xnrdj4rk3xwvhr";
       type = "gem";
     };
-    version = "1.6.6";
+    version = "1.7.0";
   };
   ostruct = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "05xqijcf80sza5pnlp1c8whdaay8x5dc13214ngh790zrizgp8q9";
+      sha256 = "04nrir9wdpc4izqwqbysxyly8y7hsfr4fsv69rw91lfi9d5fv8lm";
       type = "gem";
     };
-    version = "0.6.1";
+    version = "0.6.3";
   };
   parslet = {
     groups = [ "default" ];
@@ -172,30 +172,30 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1lirwlw59apc8m1wjk85y2xidiv0fkxjn6f7p84yqmmyvish6qjp";
+      sha256 = "0d8q5c4nh2g9pp758kizh8sfrvngynrjlm0i1zn3cnsnfd4v160i";
       type = "gem";
     };
-    version = "0.6.0";
+    version = "0.6.3";
   };
   rexml = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1jmbf6lf7pcyacpb939xjjpn1f84c3nw83dy3p1lwjx0l2ljfif7";
+      sha256 = "0hninnbvqd2pn40h863lbrn9p11gvdxp928izkag5ysx8b1s5q0r";
       type = "gem";
     };
-    version = "3.4.1";
+    version = "3.4.4";
   };
   rouge = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1pchwrkr0994v7mh054lcp0na3bk3mj2sk0dc33bn6bhxrnirj1a";
+      sha256 = "0fd77qcz603mli4lyi97cjzkv02hsfk60m495qv5qcn02mkqk9fv";
       type = "gem";
     };
-    version = "4.5.1";
+    version = "4.7.0";
   };
   safe_yaml = {
     groups = [ "default" ];
@@ -237,20 +237,20 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0fwia5hvc1xz9w7vprzjnsym3v9j5l9ggdvy70jixbvpcpz4acfz";
+      sha256 = "0b7pzx45f1vg6f53midy70ndlmb0k4k03zp4nsq8l0q9dx5yk8dp";
       type = "gem";
     };
-    version = "0.10.3";
+    version = "0.10.4";
   };
   tilt = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0szpapi229v3scrvw1pgy0vpjm7z3qlf58m1198kxn70cs278g96";
+      sha256 = "1cvaikq1dcbfl008i16c1pi1gmdax7vfkvmhch64jdkakyk9nnqd";
       type = "gem";
     };
-    version = "2.6.0";
+    version = "2.7.0";
   };
   tty-color = {
     groups = [ "default" ];

No auto update branch exists
Old version 2.1.88" not present in master derivation file with contents: {
  lib,
  bundlerApp,
  bundlerUpdateScript,
}:

bundlerApp {
  pname = "doing";
  exes = lib.singleton "doing";

  gemdir = ./.;

  passthru.updateScript = bundlerUpdateScript "doing";

  meta = {
    description = "Command line tool for keeping track of what you’re doing and tracking what you’ve done";
    longDescription = ''
      doing is a basic CLI for adding and listing "what was I doing" reminders
      in a TaskPaper-formatted text file. It allows for multiple
      sections/categories and flexible output formatting.
    '';
    homepage = "https://brettterpstra.com/projects/doing/";
    license = lib.licenses.mit;
    maintainers = with lib.maintainers; [
      ktf
      nicknovitski
    ];
    platforms = lib.platforms.unix;
    mainProgram = "doing";
  };
}