diff --git a/pkgs/by-name/ab/abseil-cpp_202501/package.nix b/pkgs/by-name/ab/abseil-cpp_202501/package.nix
deleted file mode 100644
index 7fffca86c037..000000000000
--- a/pkgs/by-name/ab/abseil-cpp_202501/package.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  cmake,
-  gtest,
-  static ? stdenv.hostPlatform.isStatic,
-  cxxStandard ? null,
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "abseil-cpp";
-  version = "20250127.1";
-
-  src = fetchFromGitHub {
-    owner = "abseil";
-    repo = "abseil-cpp";
-    tag = finalAttrs.version;
-    hash = "sha256-QTywqQCkyGFpdbtDBvUwz9bGXxbJs/qoFKF6zYAZUmQ=";
-  };
-
-  cmakeFlags = [
-    (lib.cmakeBool "ABSL_BUILD_TEST_HELPERS" true)
-    (lib.cmakeBool "ABSL_USE_EXTERNAL_GOOGLETEST" true)
-    (lib.cmakeBool "BUILD_SHARED_LIBS" (!static))
-  ]
-  ++ lib.optionals (cxxStandard != null) [
-    (lib.cmakeFeature "CMAKE_CXX_STANDARD" cxxStandard)
-  ];
-
-  strictDeps = true;
-
-  nativeBuildInputs = [ cmake ];
-
-  buildInputs = [ gtest ];
-
-  meta = {
-    description = "Open-source collection of C++ code designed to augment the C++ standard library";
-    homepage = "https://abseil.io/";
-    changelog = "https://github.com/abseil/abseil-cpp/releases/tag/${finalAttrs.version}";
-    license = lib.licenses.asl20;
-    platforms = lib.platforms.all;
-    maintainers = [ lib.maintainers.GaetanLepage ];
-  };
-})
diff --git a/pkgs/by-name/ab/abseil-cpp_202505/package.nix b/pkgs/by-name/ab/abseil-cpp_202505/package.nix
deleted file mode 100644
index c1884d4a953d..000000000000
--- a/pkgs/by-name/ab/abseil-cpp_202505/package.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  cmake,
-  gtest,
-  static ? stdenv.hostPlatform.isStatic,
-  cxxStandard ? null,
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "abseil-cpp";
-  version = "20250512.1";
-
-  src = fetchFromGitHub {
-    owner = "abseil";
-    repo = "abseil-cpp";
-    tag = finalAttrs.version;
-    hash = "sha256-eB7OqTO9Vwts9nYQ/Mdq0Ds4T1KgmmpYdzU09VPWOhk=";
-  };
-
-  cmakeFlags = [
-    (lib.cmakeBool "ABSL_BUILD_TEST_HELPERS" true)
-    (lib.cmakeBool "ABSL_USE_EXTERNAL_GOOGLETEST" true)
-    (lib.cmakeBool "BUILD_SHARED_LIBS" (!static))
-  ]
-  ++ lib.optionals (cxxStandard != null) [
-    (lib.cmakeFeature "CMAKE_CXX_STANDARD" cxxStandard)
-  ];
-
-  strictDeps = true;
-
-  nativeBuildInputs = [ cmake ];
-
-  buildInputs = [ gtest ];
-
-  meta = {
-    description = "Open-source collection of C++ code designed to augment the C++ standard library";
-    homepage = "https://abseil.io/";
-    changelog = "https://github.com/abseil/abseil-cpp/releases/tag/${finalAttrs.version}";
-    license = lib.licenses.asl20;
-    platforms = lib.platforms.all;
-    maintainers = [ lib.maintainers.GaetanLepage ];
-  };
-})
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 13c63b14235c..569bad685317 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -383,6 +383,8 @@ mapAliases {
   AusweisApp2 = ausweisapp; # Added 2023-11-08
   a4term = a4; # Added 2023-10-06
   abseil-cpp_202301 = throw "abseil-cpp_202301 has been removed as it was unused in tree"; # Added 2025-08-09
+  abseil-cpp_202501 = throw "abseil-cpp_202501 has been removed as it was unused in tree"; # Added 2025-09-15
+  abseil-cpp_202505 = throw "abseil-cpp_202505 has been removed as it was unused in tree"; # Added 2025-09-15
   acorn = throw "acorn has been removed as the upstream project was archived"; # Added 2024-04-27
   acousticbrainz-client = throw "acousticbrainz-client has been removed since the AcousticBrainz project has been shut down"; # Added 2024-06-04
   adminer-pematon = adminneo; # Added 2025-02-20