diff --git a/pkgs/applications/science/math/cemu/default.nix b/pkgs/applications/science/math/cemu/default.nix
index 35b9200a4774..374b245e2499 100644
--- a/pkgs/applications/science/math/cemu/default.nix
+++ b/pkgs/applications/science/math/cemu/default.nix
@@ -7,7 +7,7 @@
 , qtbase
 , qmake
 , git
-, libpng_apng
+, libpng
 , pkg-config
 , wrapQtAppsHook
 , stdenv
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     libarchive
     libusb-compat-0_1
     qtbase
-    libpng_apng
+    libpng
   ];
 
   qmakeFlags = [
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 818b8118d434..70e3bd958aaf 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -601,6 +601,7 @@ mapAliases ({
   liblrdf = throw "'liblrdf' has been renamed to/replaced by 'lrdf'"; # Converted to throw 2022-02-22
   libmsgpack = throw "'libmsgpack' has been renamed to/replaced by 'msgpack'"; # Converted to throw 2022-02-22
   libosmpbf = throw "libosmpbf was removed because it is no longer required by osrm-backend";
+  libpng_apng = throw "libpng_apng has been removed, because it is equivalent to libpng"; # Added 2021-03-21
   libqmatrixclient = throw "libqmatrixclient was renamed to libquotient"; # Added 2020-04-09
   libqrencode = throw "'libqrencode' has been renamed to/replaced by 'qrencode'"; # Converted to throw 2022-02-22
   librdf = lrdf; # Added 2020-03-22
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3f815ac292c6..18a07c1875a1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18694,7 +18694,6 @@ with pkgs;
   libplacebo = callPackage ../development/libraries/libplacebo { };
 
   libpng = callPackage ../development/libraries/libpng { };
-  libpng_apng = libpng.override { apngSupport = true; };
   libpng12 = callPackage ../development/libraries/libpng/12.nix { };
 
   libpostal = callPackage ../development/libraries/libpostal { };
@@ -25958,7 +25957,6 @@ with pkgs;
   firefoxPackages = recurseIntoAttrs (callPackage ../applications/networking/browsers/firefox/packages.nix {
     callPackage = newScope {
       inherit (rustPackages) cargo rustc;
-      libpng = libpng_apng;
       gnused = gnused_422;
       inherit (darwin.apple_sdk.frameworks) CoreMedia ExceptionHandling
                                             Kerberos AVFoundation MediaToolbox
@@ -29444,7 +29442,6 @@ with pkgs;
   thunderbirdPackages = recurseIntoAttrs (callPackage ../applications/networking/mailreaders/thunderbird/packages.nix {
     callPackage = newScope {
       inherit (rustPackages) cargo rustc;
-      libpng = libpng_apng;
       gnused = gnused_422;
       inherit (darwin.apple_sdk.frameworks) CoreMedia ExceptionHandling
                                             Kerberos AVFoundation MediaToolbox