diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index 2678188e8cf..a31747c512b 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -243,14 +243,6 @@ let
     ) args; in self;
 
 in {
-  ruby_2_5 = generic {
-    version = rubyVersion "2" "5" "8" "";
-    sha256 = {
-      src = "16md4jspjwixjlbhx3pnd5iwpca07p23ghkxkqd82sbchw3xy2vc";
-      git = "19gkk3q9l33cwkfsp5k8f8fipq7gkyqkqirm9farbvy425519rv2";
-    };
-  };
-
   ruby_2_6 = generic {
     version = rubyVersion "2" "6" "6" "";
     sha256 = {
diff --git a/pkgs/development/ruby-modules/with-packages/test.nix b/pkgs/development/ruby-modules/with-packages/test.nix
index 946854e4545..bcd9a787f7d 100644
--- a/pkgs/development/ruby-modules/with-packages/test.nix
+++ b/pkgs/development/ruby-modules/with-packages/test.nix
@@ -6,7 +6,6 @@ let
   stdenv = pkgs.stdenv;
 
   rubyVersions = with pkgs; [
-    ruby_2_5
     ruby_2_6
     ruby_2_7
   ];
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index b030289d77c..a8ec129ff60 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -565,6 +565,8 @@ mapAliases ({
   ruby_2_4 = throw "ruby_2_4 was deprecated in 2019-12: use a newer version of ruby";
   ruby_2_5_0 = throw "ruby_2_5_0 was deprecated on 2018-02-13: use a newer version of ruby";
   rubyPackages_2_4 = throw "rubyPackages_2_4 was deprecated in 2019-12: use a newer version of rubyPackages instead";
+  ruby_2_5 = throw "ruby_2_5 was deprecated in 2021-02: use a newer version of ruby";
+  rubyPackages_2_5 = throw "rubyPackages_2_5 was deprecated in 2021-02: use a newer version of rubyPackages instead";
   rubygems = throw "rubygems was deprecated on 2016-03-02: rubygems is now bundled with ruby";
   rubyMinimal = throw "rubyMinimal was removed due to being unused";
   rxvt_unicode-with-plugins = rxvt-unicode; # added 2020-02-02
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b56d184d0d1..4d3fc0c055f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11418,14 +11418,12 @@ in
     autoreconfHook = buildPackages.autoreconfHook269;
     bison = buildPackages.bison_3_5;
   })
-    ruby_2_5
     ruby_2_6
     ruby_2_7;
 
   ruby = ruby_2_6;
   rubyPackages = rubyPackages_2_6;
 
-  rubyPackages_2_5 = recurseIntoAttrs ruby_2_5.gems;
   rubyPackages_2_6 = recurseIntoAttrs ruby_2_6.gems;
   rubyPackages_2_7 = recurseIntoAttrs ruby_2_7.gems;