Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: fpm 1.16.0 -> 1.17.0 https://github.com/jordansissel/fpm/releases
attrpath: fpm
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/8qxn224kcy902jrhxqr3w638l613nhsb-packages.json.drv
building '/nix/store/8qxn224kcy902jrhxqr3w638l613nhsb-packages.json.drv'...

Going to be running update for following packages:
 - fpm-1.16.0

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - fpm-1.16.0: UPDATING ...
 - fpm-1.16.0: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/tools/package-management/fpm/Gemfile.lock b/pkgs/tools/package-management/fpm/Gemfile.lock
index ab4520e7bdd8..1cd2854f9c2a 100644
--- a/pkgs/tools/package-management/fpm/Gemfile.lock
+++ b/pkgs/tools/package-management/fpm/Gemfile.lock
@@ -2,28 +2,28 @@ GEM
   remote: https://rubygems.org/
   specs:
     arr-pm (0.0.12)
-    backports (3.25.1)
-    cabin (0.9.0)
-    clamp (1.3.2)
-    dotenv (3.1.7)
-    fpm (1.16.0)
+    backports (3.25.3)
+    cabin (0.9.1)
+    clamp (1.5.2)
+    dotenv (2.8.1)
+    fpm (1.17.0)
       arr-pm (~> 0.0.11)
       backports (>= 2.6.2)
-      cabin (>= 0.6.0)
+      cabin (>= 0.9.1)
       clamp (>= 1.0.0)
       pleaserun (~> 0.0.29)
       rexml
       stud
     insist (1.0.0)
     mustache (0.99.8)
-    pleaserun (0.0.32)
+    pleaserun (0.0.33)
       cabin (> 0)
       clamp
-      dotenv
+      dotenv (~> 2)
       insist
       mustache (= 0.99.8)
       stud
-    rexml (3.4.1)
+    rexml (3.4.4)
     stud (0.0.23)
 
 PLATFORMS
@@ -33,4 +33,4 @@ DEPENDENCIES
   fpm
 
 BUNDLED WITH
-   2.6.2
+   2.7.2
diff --git a/pkgs/tools/package-management/fpm/gemset.nix b/pkgs/tools/package-management/fpm/gemset.nix
index 877c7eafe1b5..655d38dd896a 100644
--- a/pkgs/tools/package-management/fpm/gemset.nix
+++ b/pkgs/tools/package-management/fpm/gemset.nix
@@ -14,40 +14,40 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1n2awv56zgizrzvjn2snv98dpnwx78pfs090y4ycdfadnjfvr7s3";
+      sha256 = "0dbjl5ilyzlhl4p60pq41kdy4j8bg21f4m1vccawlh1wvhr8sacl";
       type = "gem";
     };
-    version = "3.25.1";
+    version = "3.25.3";
   };
   cabin = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0b3b8j3iqnagjfn1261b9ncaac9g44zrx1kcg81yg4z9i513kici";
+      sha256 = "0b9jw1v1f476x0y38hn8f7nfv7wydq1skw1kdvxsi6q3z1d3ijfw";
       type = "gem";
     };
-    version = "0.9.0";
+    version = "0.9.1";
   };
   clamp = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "08m0syh06bhx8dqn560ivjg96l5cs5s3l9jh2szsnlcdcyl9jsjg";
+      sha256 = "1p2abxshwvj3khg7k3cfg3kcghqj9jfz6yh9nmz48q4vbhp23v9g";
       type = "gem";
     };
-    version = "1.3.2";
+    version = "1.5.2";
   };
   dotenv = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1wrw6fm0s38cd6h55w79bkvjhcj2zfkargjpws4kilkmhr3xyw66";
+      sha256 = "1n0pi8x8ql5h1mijvm8lgn6bhq4xjb5a500p5r1krq4s6j9lg565";
       type = "gem";
     };
-    version = "3.1.7";
+    version = "2.8.1";
   };
   fpm = {
     dependencies = [
@@ -63,10 +63,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1pxmglms9cz11dn72zz31hq2s2ndjkhj3qzjiqxrvpzv7ihzxsnr";
+      sha256 = "14dpimnpkh3p2h5la5kvcirl5qqnnwvar0hja562k5g9xwp3lid8";
       type = "gem";
     };
-    version = "1.16.0";
+    version = "1.17.0";
   };
   insist = {
     groups = [ "default" ];
@@ -101,20 +101,20 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1aykf0l8327bqkkf5xd9jcglsib973zpy37cfnlf4j0vp0cdpn2d";
+      sha256 = "0gxpzwj79wdiqmyfrxaslb9pr7cp9jgbvk4jg55c8vcmqr5cs7m6";
       type = "gem";
     };
-    version = "0.0.32";
+    version = "0.0.33";
   };
   rexml = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1jmbf6lf7pcyacpb939xjjpn1f84c3nw83dy3p1lwjx0l2ljfif7";
+      sha256 = "0hninnbvqd2pn40h863lbrn9p11gvdxp928izkag5ysx8b1s5q0r";
       type = "gem";
     };
-    version = "3.4.1";
+    version = "3.4.4";
   };
   stud = {
     groups = [ "default" ];

No auto update branch exists
Old version 1.16.0" not present in master derivation file with contents: {
  lib,
  bundlerApp,
  bundlerUpdateScript,
}:

bundlerApp {
  pname = "fpm";
  gemdir = ./.;
  exes = [ "fpm" ];

  passthru.updateScript = bundlerUpdateScript "fpm";

  meta = {
    description = "Tool to build packages for multiple platforms with ease";
    homepage = "https://github.com/jordansissel/fpm";
    license = lib.licenses.mit;
    maintainers = with lib.maintainers; [
      nicknovitski
    ];
    platforms = lib.platforms.unix;
    mainProgram = "fpm";
  };
}