diff --git a/pkgs/applications/networking/mkchromecast/default.nix b/pkgs/applications/networking/mkchromecast/default.nix
index 4faad8ccaaec..f0db4eec7065 100644
--- a/pkgs/applications/networking/mkchromecast/default.nix
+++ b/pkgs/applications/networking/mkchromecast/default.nix
@@ -12,7 +12,7 @@
   pulseaudio,
   nodejs,
   yt-dlp,
-  opusTools,
+  opus-tools,
   gst_all_1,
   enableSonos ? true,
   qtwayland,
@@ -23,7 +23,7 @@ let
     sox
     flac
     lame
-    opusTools
+    opus-tools
     gst_all_1.gstreamer
     nodejs
     ffmpeg
diff --git a/pkgs/by-name/as/asunder/package.nix b/pkgs/by-name/as/asunder/package.nix
index 190df9934acc..e9ab12962cfb 100644
--- a/pkgs/by-name/as/asunder/package.nix
+++ b/pkgs/by-name/as/asunder/package.nix
@@ -15,7 +15,7 @@
   flacSupport ? true,
   flac,
   opusSupport ? false,
-  opusTools,
+  opus-tools,
   wavpackSupport ? false,
   wavpack,
   #, musepackSupport ? false, TODO: mpcenc
@@ -29,7 +29,7 @@ let
     lib.optional mp3Support lame
     ++ lib.optional oggSupport vorbis-tools
     ++ lib.optional flacSupport flac
-    ++ lib.optional opusSupport opusTools
+    ++ lib.optional opusSupport opus-tools
     ++ lib.optional wavpackSupport wavpack
     ++ lib.optional monkeysAudioSupport monkeys-audio
     ++ [ cdparanoia ];
diff --git a/pkgs/by-name/ca/caudec/package.nix b/pkgs/by-name/ca/caudec/package.nix
index b53a71d7d7ab..06b8c8622a28 100644
--- a/pkgs/by-name/ca/caudec/package.nix
+++ b/pkgs/by-name/ca/caudec/package.nix
@@ -7,7 +7,7 @@
   findutils,
   flac,
   lame,
-  opusTools,
+  opus-tools,
   procps,
   sox,
 }:
@@ -40,7 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
           findutils
           sox
           procps
-          opusTools
+          opus-tools
           lame
           flac
         ]
diff --git a/pkgs/by-name/fl/flac2all/package.nix b/pkgs/by-name/fl/flac2all/package.nix
index 2ed601e76dd4..ebe3e5b2d236 100644
--- a/pkgs/by-name/fl/flac2all/package.nix
+++ b/pkgs/by-name/fl/flac2all/package.nix
@@ -4,7 +4,7 @@
   lib,
   flac,
   lame,
-  opusTools,
+  opus-tools,
   vorbis-tools,
   ffmpeg,
 }:
@@ -40,7 +40,7 @@ python3Packages.buildPythonApplication (finalAttrs: {
           flac
           lame
           # Optional deps depending on encoding types
-          opusTools
+          opus-tools
           vorbis-tools
           ffmpeg
         ]
diff --git a/pkgs/by-name/fl/flacon/package.nix b/pkgs/by-name/fl/flacon/package.nix
index 594f25869473..5528bc4b42a5 100644
--- a/pkgs/by-name/fl/flacon/package.nix
+++ b/pkgs/by-name/fl/flacon/package.nix
@@ -7,7 +7,7 @@
   pkg-config,
   shntool,
   flac,
-  opusTools,
+  opus-tools,
   vorbis-tools,
   mp3gain,
   lame,
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
   bin_path = lib.makeBinPath [
     shntool
     flac
-    opusTools
+    opus-tools
     vorbis-tools
     mp3gain
     lame
diff --git a/pkgs/by-name/op/opusTools/package.nix b/pkgs/by-name/op/opus-tools/package.nix
similarity index 100%
rename from pkgs/by-name/op/opusTools/package.nix
rename to pkgs/by-name/op/opus-tools/package.nix
diff --git a/pkgs/by-name/pu/pulseaudio-dlna/package.nix b/pkgs/by-name/pu/pulseaudio-dlna/package.nix
index 2b995bacd9a9..f8fc1118d21b 100644
--- a/pkgs/by-name/pu/pulseaudio-dlna/package.nix
+++ b/pkgs/by-name/pu/pulseaudio-dlna/package.nix
@@ -5,7 +5,7 @@
   mp3Support ? true,
   lame,
   opusSupport ? true,
-  opusTools,
+  opus-tools,
   faacSupport ? false,
   faac,
   flacSupport ? true,
@@ -53,7 +53,7 @@ python3Packages.buildPythonApplication {
       zeroconf
     ]
     ++ lib.optional mp3Support lame
-    ++ lib.optional opusSupport opusTools
+    ++ lib.optional opusSupport opus-tools
     ++ lib.optional faacSupport faac
     ++ lib.optional flacSupport flac
     ++ lib.optional soxSupport sox
diff --git a/pkgs/kde/gear/audiocd-kio/default.nix b/pkgs/kde/gear/audiocd-kio/default.nix
index c99990ff606c..f331cac51aa1 100644
--- a/pkgs/kde/gear/audiocd-kio/default.nix
+++ b/pkgs/kde/gear/audiocd-kio/default.nix
@@ -7,7 +7,7 @@
   libvorbis,
   replaceVars,
   lame,
-  opusTools,
+  opus-tools,
 }:
 mkKdeDerivation {
   pname = "audiocd-kio";
@@ -15,7 +15,7 @@ mkKdeDerivation {
   patches = [
     (replaceVars ./encoder-paths.patch {
       lame = lib.getExe lame;
-      opusenc = "${opusTools}/bin/opusenc";
+      opusenc = "${opus-tools}/bin/opusenc";
     })
   ];
 
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 8823598b6f53..9858f46d133b 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1454,6 +1454,7 @@ mapAliases {
   opentofu-ls = warnAlias "'opentofu-ls' has been renamed to 'tofu-ls'" tofu-ls; # Added 2025-06-10
   opentracing-cpp = throw "'opentracingc-cpp' has been removed as it was archived upstream in 2024"; # Added 2025-10-19
   opera = throw "'opera' has been removed due to lack of maintenance in nixpkgs"; # Added 2025-05-19
+  opusTools = warnAlias "'opusTools' has been renamed to 'opus-tools'" opus-tools; # Added 2026-02-12
   orogene = throw "'orogene' uses a wasm-specific fork of async-tar that is vulnerable to CVE-2025-62518, which is not supported by its upstream"; # Added 2025-10-24
   ortp = throw "'ortp' has been moved to 'linphonePackages.ortp'"; # Added 2025-09-20
   OSCAR = throw "'OSCAR' has been renamed to/replaced by 'oscar'"; # Converted to throw 2025-10-27