diff --git a/pkgs/by-name/ak/akkoma/package.nix b/pkgs/by-name/ak/akkoma/package.nix
index 1eba2698ff6f..c2568cc4c6f3 100644
--- a/pkgs/by-name/ak/akkoma/package.nix
+++ b/pkgs/by-name/ak/akkoma/package.nix
@@ -9,9 +9,9 @@
 }:
 
 let
-  beamPackages = beam_minimal.packages.erlang_26.extend (
+  beamPackages = beam_minimal.packages.erlang_27.extend (
     self: super: {
-      elixir = self.elixir_1_16;
+      elixir = self.elixir_1_17;
       rebar3 = self.rebar3WithPlugins {
         plugins = with self; [ pc ];
       };
diff --git a/pkgs/by-name/pl/pleroma/package.nix b/pkgs/by-name/pl/pleroma/package.nix
index 33d206419ef1..35ba807e126a 100644
--- a/pkgs/by-name/pl/pleroma/package.nix
+++ b/pkgs/by-name/pl/pleroma/package.nix
@@ -16,7 +16,7 @@
 }:
 
 let
-  beamPackages = beam.packages.erlang_26.extend (self: super: { elixir = elixir_1_17; });
+  beamPackages = beam.packages.erlang_27.extend (self: super: { elixir = elixir_1_17; });
 in
 beamPackages.mixRelease rec {
   pname = "pleroma";
diff --git a/pkgs/development/interpreters/erlang/26.nix b/pkgs/development/interpreters/erlang/26.nix
deleted file mode 100644
index c3de12390853..000000000000
--- a/pkgs/development/interpreters/erlang/26.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-genericBuilder:
-
-genericBuilder {
-  version = "26.2.5.18";
-  hash = "sha256-mCkJeRf6PsMsVJXBIpPoHMff5JyVXLSzPzCyLiJtgJo=";
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index b89ce2544678..1718036142fd 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -661,6 +661,7 @@ mapAliases {
   eris-go = throw "'eris-go' has been removed due to a hostile upstream moving tags and breaking src FODs"; # Added 2025-09-01
   eriscmd = throw "'eriscmd' has been removed due to a hostile upstream moving tags and breaking src FODs"; # Added 2025-09-01
   erlang-ls = throw "'erlang-ls' has been removed as it has been archived upstream. Consider using 'erlang-language-platform' instead"; # Added 2025-10-02
+  erlang_26 = throw "'erlang_26' has been removed, as it is EOL"; # added 2026-04-01
   esbuild-config = throw "'esbuild-config' has been removed as it has been unmaintained upstream since September 2022"; # Added 2026-02-07
   etBook = warnAlias "'etBook' has been renamed to 'et-book'" et-book; # Added 2026-02-08
   ethercalc = throw "'ethercalc' has been removed from nixpkgs as the project was old, unmaintained, and could not be packaged well in nixpkgs"; # Added 2025-11-28
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b825be4e14e8..e63029f1fcb4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5013,7 +5013,6 @@ with pkgs;
     erlang
     erlang_28
     erlang_27
-    erlang_26
     ;
 
   inherit (beam.packages.erlang_28.beamPackages)
@@ -5029,11 +5028,6 @@ with pkgs;
     lfe
     ;
 
-  inherit (beam.packages.erlang_26.beamPackages)
-    elixir_1_16
-    elixir_1_15
-    ;
-
   inherit (beam.packages.erlang)
     erlfmt
     elvis-erlang
@@ -5046,12 +5040,10 @@ with pkgs;
   beamPackages = dontRecurseIntoAttrs beam.packages.erlang.beamPackages;
   beamMinimalPackages = dontRecurseIntoAttrs beam_minimal.packages.erlang.beamPackages;
 
-  beam26Packages = recurseIntoAttrs beam.packages.erlang_26.beamPackages;
   beam27Packages = recurseIntoAttrs beam.packages.erlang_27.beamPackages;
   beam28Packages = recurseIntoAttrs beam.packages.erlang_28.beamPackages;
   beam29Packages = dontRecurseIntoAttrs beam.packages.erlang_29.beamPackages;
 
-  beamMinimal26Packages = recurseIntoAttrs beam_minimal.packages.erlang_26.beamPackages;
   beamMinimal27Packages = recurseIntoAttrs beam_minimal.packages.erlang_27.beamPackages;
   beamMinimal28Packages = recurseIntoAttrs beam_minimal.packages.erlang_28.beamPackages;
   beamMinimal29Packages = dontRecurseIntoAttrs beam_minimal.packages.erlang_29.beamPackages;
diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index 915424a82a11..694963d069d0 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -1,4 +1,5 @@
 {
+  config,
   lib,
   beam,
   callPackage,
@@ -46,10 +47,6 @@ in
       inherit wxSupport systemdSupport;
     };
 
-    erlang_26 = callErlang ../development/interpreters/erlang/26.nix {
-      inherit wxSupport systemdSupport;
-    };
-
     # Other Beam languages. These are built with `beam.interpreters.erlang`. To
     # access for example elixir built with different version of Erlang, use
     # `beam.packages.erlang_27.elixir`.
@@ -76,6 +73,11 @@ in
     erlang_29 = self.packagesWith self.interpreters.erlang_29;
     erlang_28 = self.packagesWith self.interpreters.erlang_28;
     erlang_27 = self.packagesWith self.interpreters.erlang_27;
-    erlang_26 = self.packagesWith self.interpreters.erlang_26;
+  }
+  // lib.optionalAttrs config.allowAliases {
+    erlang_26 = throw "'erlang_26' has been removed, as it is EOL"; # added 2026-04-01
   };
 }
+// lib.optionalAttrs config.allowAliases {
+  erlang_26 = throw "'erlang_26' has been removed, as it is EOL"; # added 2026-04-01
+}