diff --git a/pkgs/development/compilers/gnat-bootstrap/default.nix b/pkgs/development/compilers/gnat-bootstrap/default.nix
index 3a3cecb77620..9a6e728c9fcc 100644
--- a/pkgs/development/compilers/gnat-bootstrap/default.nix
+++ b/pkgs/development/compilers/gnat-bootstrap/default.nix
@@ -112,6 +112,33 @@ stdenv.mkDerivation (
           };
         }
         .${stdenv.hostPlatform.system} or throwUnsupportedSystem;
+        "16" = {
+          gccVersion = "16.1.0";
+          alireRevision = "1";
+        }
+        // {
+          x86_64-darwin = {
+            inherit url;
+            hash = "sha256-u/cYFKqWLTaFADTscDxnrkYSoemKrfKpNIZ8XPlTbLI=";
+            upstreamTriplet = "x86_64-apple-darwin24.6.0";
+          };
+          x86_64-linux = {
+            inherit url;
+            hash = "sha256-5bKYPJnXDGa80BtAogLE82X0zTuYKdN2cKh503oMeic=";
+            upstreamTriplet = "x86_64-pc-linux-gnu";
+          };
+          aarch64-linux = {
+            inherit url;
+            hash = "sha256-jJnqDJGBOjqbT4hDW0nRpV0oA3RXxJhvI7BuvQkPDQI=";
+            upstreamTriplet = "aarch64-linux-gnu";
+          };
+          aarch64-darwin = {
+            inherit url;
+            hash = "sha256-TJlV/Ngq6SwpIgGkwamTN3aRGP2BnEzJyBGovtWb6Y0=";
+            upstreamTriplet = "aarch64-apple-darwin24.6.0";
+          };
+        }
+        .${stdenv.hostPlatform.system} or throwUnsupportedSystem;
       };
     inherit (versionMap.${majorVersion}) gccVersion alireRevision upstreamTriplet;
   in
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ac829ad6ab91..2de22e5837ee 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3562,7 +3562,7 @@ with pkgs;
       # If we are cross-compiling GNAT, we may as well do the same.
       gnat-bootstrap =
         if stdenv.hostPlatform == stdenv.targetPlatform && stdenv.buildPlatform == stdenv.hostPlatform then
-          buildPackages.gnat-bootstrap15
+          buildPackages.gnat-bootstrap16
         else
           buildPackages.gnat16;
       stdenv =
@@ -3571,7 +3571,7 @@ with pkgs;
           && stdenv.buildPlatform == stdenv.hostPlatform
           && stdenv.buildPlatform.isDarwin
         then
-          overrideCC gccStdenv gnat-bootstrap15
+          overrideCC gccStdenv gnat-bootstrap16
         else
           stdenv;
     }
@@ -3593,6 +3593,11 @@ with pkgs;
     isAlireGNAT = true;
   };
 
+  gnat-bootstrap16 = wrapCCWith {
+    cc = callPackage ../development/compilers/gnat-bootstrap { majorVersion = "16"; };
+    isAlireGNAT = true;
+  };
+
   gnat13Packages = recurseIntoAttrs (callPackage ./ada-packages.nix { gnat = buildPackages.gnat13; });
   gnat14Packages = recurseIntoAttrs (callPackage ./ada-packages.nix { gnat = buildPackages.gnat14; });
   gnat15Packages = recurseIntoAttrs (callPackage ./ada-packages.nix { gnat = buildPackages.gnat15; });