diff --git a/pkgs/by-name/co/cosmic-applets/dedup-cosmic-settings.patch b/pkgs/by-name/co/cosmic-applets/dedup-cosmic-settings.patch
new file mode 100644
index 000000000000..19d4a331724e
--- /dev/null
+++ b/pkgs/by-name/co/cosmic-applets/dedup-cosmic-settings.patch
@@ -0,0 +1,58 @@
+diff --git a/Cargo.lock b/Cargo.lock
+index 7c10e63a..052a5852 100644
+--- a/Cargo.lock
++++ b/Cargo.lock
+@@ -1658,7 +1658,7 @@ dependencies = [
+ [[package]]
+ name = "cosmic-settings-a11y-manager-subscription"
+ version = "1.0.2"
+-source = "git+https://github.com/pop-os/cosmic-settings#55b502dff39bf4be056c23888aaad185f9227eb2"
++source = "git+https://github.com/pop-os/cosmic-settings#b46a55d4237f1fd6e1bacc852ceb053e6a26c2fe"
+ dependencies = [
+  "cosmic-protocols",
+  "iced_futures",
+@@ -1672,7 +1672,7 @@ dependencies = [
+ [[package]]
+ name = "cosmic-settings-accessibility-subscription"
+ version = "1.0.2"
+-source = "git+https://github.com/pop-os/cosmic-settings#55b502dff39bf4be056c23888aaad185f9227eb2"
++source = "git+https://github.com/pop-os/cosmic-settings#b46a55d4237f1fd6e1bacc852ceb053e6a26c2fe"
+ dependencies = [
+  "cosmic-dbus-a11y",
+  "futures",
+@@ -1685,7 +1685,7 @@ dependencies = [
+ [[package]]
+ name = "cosmic-settings-airplane-mode-subscription"
+ version = "1.0.2"
+-source = "git+https://github.com/pop-os/cosmic-settings#55b502dff39bf4be056c23888aaad185f9227eb2"
++source = "git+https://github.com/pop-os/cosmic-settings#b46a55d4237f1fd6e1bacc852ceb053e6a26c2fe"
+ dependencies = [
+  "futures",
+  "iced_futures",
+@@ -1718,7 +1718,7 @@ dependencies = [
+ [[package]]
+ name = "cosmic-settings-daemon-subscription"
+ version = "1.0.2"
+-source = "git+https://github.com/pop-os/cosmic-settings#55b502dff39bf4be056c23888aaad185f9227eb2"
++source = "git+https://github.com/pop-os/cosmic-settings#b46a55d4237f1fd6e1bacc852ceb053e6a26c2fe"
+ dependencies = [
+  "futures",
+  "iced_futures",
+@@ -1731,7 +1731,7 @@ dependencies = [
+ [[package]]
+ name = "cosmic-settings-network-manager-subscription"
+ version = "1.0.2"
+-source = "git+https://github.com/pop-os/cosmic-settings#55b502dff39bf4be056c23888aaad185f9227eb2"
++source = "git+https://github.com/pop-os/cosmic-settings#b46a55d4237f1fd6e1bacc852ceb053e6a26c2fe"
+ dependencies = [
+  "bitflags 2.10.0",
+  "cosmic-dbus-networkmanager",
+@@ -1765,7 +1765,7 @@ dependencies = [
+ [[package]]
+ name = "cosmic-settings-upower-subscription"
+ version = "1.0.2"
+-source = "git+https://github.com/pop-os/cosmic-settings#55b502dff39bf4be056c23888aaad185f9227eb2"
++source = "git+https://github.com/pop-os/cosmic-settings#b46a55d4237f1fd6e1bacc852ceb053e6a26c2fe"
+ dependencies = [
+  "futures",
+  "iced_futures",
diff --git a/pkgs/by-name/co/cosmic-applets/package.nix b/pkgs/by-name/co/cosmic-applets/package.nix
index 8da525145261..d0b070b50a11 100644
--- a/pkgs/by-name/co/cosmic-applets/package.nix
+++ b/pkgs/by-name/co/cosmic-applets/package.nix
@@ -30,7 +30,15 @@ rustPlatform.buildRustPackage (finalAttrs: {
     hash = "sha256-x2FHzgbxxHJEYlCK0bi5j7WdAqAlcocLYW20y2ionBc=";
   };
 
-  cargoHash = "sha256-FWpfgqPqjbzzv6yaBKx9eq+PHCCQ/TErx+TGWqmXqXA=";
+  cargoPatches = [
+    # The lockfile references two different revisions of the same internal repository cosmic-settings,
+    # which likely is unintentional and currently causing issues with fetchCargoVendor.
+    # Upstream already resolved this because of a general dependency update, so this can be removed on the
+    # next update.
+    ./dedup-cosmic-settings.patch
+  ];
+
+  cargoHash = "sha256-R9d7slLid3x7NYXkMfcRRa4zY8/RxW+QLMZGsvHdfCw=";
 
   nativeBuildInputs = [
     just