Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: coltrane 0 -> 1
attrpath: coltrane
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/2kbqignibw2fijqi5qkf9qb8hfjcqr97-packages.json.drv
building '/nix/store/2kbqignibw2fijqi5qkf9qb8hfjcqr97-packages.json.drv'...

Going to be running update for following packages:
 - coltrane-4.1.2

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - coltrane-4.1.2: UPDATING ...
 - coltrane-4.1.2: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/co/coltrane/Gemfile.lock b/pkgs/by-name/co/coltrane/Gemfile.lock
index 466b264e2f78..304f11da8959 100644
--- a/pkgs/by-name/co/coltrane/Gemfile.lock
+++ b/pkgs/by-name/co/coltrane/Gemfile.lock
@@ -1,22 +1,21 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (8.0.2)
+    activesupport (8.1.3.1)
       base64
-      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      json
       logger (>= 1.4.2)
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
       uri (>= 0.13.1)
     base64 (0.3.0)
-    benchmark (0.4.1)
-    bigdecimal (3.2.2)
+    bigdecimal (4.1.2)
     cli-ui (1.5.1)
     color (1.8)
     coltrane (4.1.2)
@@ -25,8 +24,8 @@ GEM
       dry-monads (~> 0.4)
       gambiarra (= 0.0.6)
       paint (~> 2.0)
-    concurrent-ruby (1.3.5)
-    connection_pool (2.5.3)
+    concurrent-ruby (1.3.8)
+    connection_pool (3.0.2)
     drb (2.2.3)
     dry-core (0.9.1)
       concurrent-ruby (~> 1.0)
@@ -39,17 +38,21 @@ GEM
       activesupport (> 5.2)
       cli-ui (~> 1.1)
       thor (~> 1.1.0)
-    i18n (1.14.7)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
+    json (2.21.2)
     logger (1.7.0)
-    minitest (5.25.5)
+    minitest (6.0.6)
+      drb (~> 2.0)
+      prism (~> 1.5)
     paint (2.3.0)
+    prism (1.9.0)
     securerandom (0.4.1)
     thor (1.1.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    uri (1.0.3)
-    zeitwerk (2.7.3)
+    uri (1.1.1)
+    zeitwerk (2.8.3)
 
 PLATFORMS
   ruby
@@ -58,4 +61,4 @@ DEPENDENCIES
   coltrane
 
 BUNDLED WITH
-   2.6.9
+   2.7.2
diff --git a/pkgs/by-name/co/coltrane/gemset.nix b/pkgs/by-name/co/coltrane/gemset.nix
index 909d1dda901e..6f46195b072f 100644
--- a/pkgs/by-name/co/coltrane/gemset.nix
+++ b/pkgs/by-name/co/coltrane/gemset.nix
@@ -2,12 +2,12 @@
   activesupport = {
     dependencies = [
       "base64"
-      "benchmark"
       "bigdecimal"
       "concurrent-ruby"
       "connection_pool"
       "drb"
       "i18n"
+      "json"
       "logger"
       "minitest"
       "securerandom"
@@ -18,10 +18,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0pm40y64wfc50a9sj87kxvil2102rmpdcbv82zf0r40vlgdwsrc5";
+      sha256 = "0xhkhdx8svhaf439y398yixik0snzarnnsy43688p92yy9jqfic5";
       type = "gem";
     };
-    version = "8.0.2";
+    version = "8.1.3.1";
   };
   base64 = {
     groups = [ "default" ];
@@ -33,25 +33,15 @@
     };
     version = "0.3.0";
   };
-  benchmark = {
-    groups = [ "default" ];
-    platforms = [ ];
-    source = {
-      remotes = [ "https://rubygems.org" ];
-      sha256 = "1kicilpma5l0lwayqjb5577bm0hbjndj2gh150xz09xsgc1l1vyl";
-      type = "gem";
-    };
-    version = "0.4.1";
-  };
   bigdecimal = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1p2szbr4jdvmwaaj2kxlbv1rp0m6ycbgfyp0kjkkkswmniv5y21r";
+      sha256 = "1g9zi8c4i7g8zz0c3hxrw6mblrjvgn7akys60clb9si7c1k1gljk";
       type = "gem";
     };
-    version = "3.2.2";
+    version = "4.1.2";
   };
   cli-ui = {
     groups = [ "default" ];
@@ -95,20 +85,20 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1ipbrgvf0pp6zxdk5ascp6i29aybz2bx9wdrlchjmpx6mhvkwfw1";
+      sha256 = "1qfi2ns3zwkgq616fc127xiqhan7g7m7gqpwriwcr34nds1vxwdj";
       type = "gem";
     };
-    version = "1.3.5";
+    version = "1.3.8";
   };
   connection_pool = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0nrhsk7b3sjqbyl1cah6ibf1kvi3v93a7wf4637d355hp614mmyg";
+      sha256 = "02ifws3c4x7b54fv17sm4cca18d2pfw1saxpdji2lbd1f6xgbzrk";
       type = "gem";
     };
-    version = "2.5.3";
+    version = "3.0.2";
   };
   drb = {
     groups = [ "default" ];
@@ -179,10 +169,20 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "03sx3ahz1v5kbqjwxj48msw3maplpp2iyzs22l4jrzrqh4zmgfnf";
+      sha256 = "1dfikmmd9dllirsfq0kjiyxpmlq0afkxm5sslsr97r9g85ifpy80";
+      type = "gem";
+    };
+    version = "1.15.2";
+  };
+  json = {
+    groups = [ "default" ];
+    platforms = [ ];
+    source = {
+      remotes = [ "https://rubygems.org" ];
+      sha256 = "0shwgjqbj856mb6m9kgkpy08nhym2gdvc2yaprlimfmky9y3n78z";
       type = "gem";
     };
-    version = "1.14.7";
+    version = "2.21.2";
   };
   logger = {
     groups = [ "default" ];
@@ -195,14 +195,18 @@
     version = "1.7.0";
   };
   minitest = {
+    dependencies = [
+      "drb"
+      "prism"
+    ];
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "0mn7q9yzrwinvfvkyjiz548a4rmcwbmz2fn9nyzh4j1snin6q6rr";
+      sha256 = "1wfnqyfayx9n9j7x871v2ars4hjhfisi1dl24fa64ylq3mns6ghm";
       type = "gem";
     };
-    version = "5.25.5";
+    version = "6.0.6";
   };
   paint = {
     groups = [ "default" ];
@@ -214,6 +218,16 @@
     };
     version = "2.3.0";
   };
+  prism = {
+    groups = [ "default" ];
+    platforms = [ ];
+    source = {
+      remotes = [ "https://rubygems.org" ];
+      sha256 = "11ggfikcs1lv17nhmhqyyp6z8nq5pkfcj6a904047hljkxm0qlvv";
+      type = "gem";
+    };
+    version = "1.9.0";
+  };
   securerandom = {
     groups = [ "default" ];
     platforms = [ ];
@@ -250,19 +264,19 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "04bhfvc25b07jaiaf62yrach7khhr5jlr5bx6nygg8pf11329wp9";
+      sha256 = "1ijpbj7mdrq7rhpq2kb51yykhrs2s54wfs6sm9z3icgz4y6sb7rp";
       type = "gem";
     };
-    version = "1.0.3";
+    version = "1.1.1";
   };
   zeitwerk = {
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "119ypabas886gd0n9kiid3q41w76gz60s8qmiak6pljpkd56ps5j";
+      sha256 = "1rcjpgyzmdxp8rdw466156fmr588k9q1wg8j42g0dkk7hid1519c";
       type = "gem";
     };
-    version = "2.7.3";
+    version = "2.8.3";
   };
 }

Package version did not change.