diff --git a/pkgs/by-name/ne/neocities/Gemfile b/pkgs/by-name/ne/neocities/Gemfile
index f9e464079d0f..8b16e34cbe49 100644
--- a/pkgs/by-name/ne/neocities/Gemfile
+++ b/pkgs/by-name/ne/neocities/Gemfile
@@ -1,2 +1,4 @@
 source 'https://rubygems.org'
 gem 'neocities'
+
+gem "mutex_m", "~> 0.3.0"
diff --git a/pkgs/by-name/ne/neocities/Gemfile.lock b/pkgs/by-name/ne/neocities/Gemfile.lock
index 91b35afca94d..a3d85893d9bc 100644
--- a/pkgs/by-name/ne/neocities/Gemfile.lock
+++ b/pkgs/by-name/ne/neocities/Gemfile.lock
@@ -3,13 +3,15 @@ GEM
   specs:
     equatable (0.5.0)
     httpclient-fixcerts (2.8.5)
+    mutex_m (0.3.0)
     necromancer (0.4.0)
-    neocities (0.0.18)
+    neocities (0.0.20)
       httpclient-fixcerts (~> 2.8, >= 2.8.5)
       pastel (~> 0.7, = 0.7.2)
       rake (~> 12.3, >= 12.3.1)
       tty-prompt (~> 0.12, = 0.12.0)
       tty-table (~> 0.10, = 0.10.0)
+      whirly (~> 0.3, >= 0.3.0)
     pastel (0.7.2)
       equatable (~> 0.5.0)
       tty-color (~> 0.4.0)
@@ -35,14 +37,16 @@ GEM
       tty-screen (~> 0.6.4)
     unicode-display_width (1.8.0)
     unicode_utils (1.4.0)
+    whirly (0.3.0)
+      unicode-display_width (>= 1.1)
     wisper (1.6.1)
 
 PLATFORMS
   ruby
-  x86_64-linux
 
 DEPENDENCIES
+  mutex_m (~> 0.3.0)
   neocities
 
 BUNDLED WITH
-   2.5.5
+   2.6.6
diff --git a/pkgs/by-name/ne/neocities/gemset.nix b/pkgs/by-name/ne/neocities/gemset.nix
index 206f77cb78eb..8e1977d660e3 100644
--- a/pkgs/by-name/ne/neocities/gemset.nix
+++ b/pkgs/by-name/ne/neocities/gemset.nix
@@ -19,6 +19,16 @@
     };
     version = "2.8.5";
   };
+  mutex_m = {
+    groups = [ "default" ];
+    platforms = [ ];
+    source = {
+      remotes = [ "https://rubygems.org" ];
+      sha256 = "0l875dw0lk7b2ywa54l0wjcggs94vb7gs8khfw9li75n2sn09jyg";
+      type = "gem";
+    };
+    version = "0.3.0";
+  };
   necromancer = {
     groups = [ "default" ];
     platforms = [ ];
@@ -36,15 +46,16 @@
       "rake"
       "tty-prompt"
       "tty-table"
+      "whirly"
     ];
     groups = [ "default" ];
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1hfvy4gc7rzxkgl2dbrjs2fqzi5mphmr22rjfhk6n0i3bd0wazbw";
+      sha256 = "17d5z0c04yx2a6g8bdkhiwyf5xvshdx4p07j2xlip8dnkkf9q4hw";
       type = "gem";
     };
-    version = "0.0.18";
+    version = "0.0.20";
   };
   pastel = {
     dependencies = [
@@ -178,6 +189,17 @@
     };
     version = "1.4.0";
   };
+  whirly = {
+    dependencies = [ "unicode-display_width" ];
+    groups = [ "default" ];
+    platforms = [ ];
+    source = {
+      remotes = [ "https://rubygems.org" ];
+      sha256 = "0dggm1jkk9hlwnh5la3zsmsh4qv7n1ycmsnakl0lgdmpzgj3w9zm";
+      type = "gem";
+    };
+    version = "0.3.0";
+  };
   wisper = {
     groups = [ "default" ];
     platforms = [ ];