diff --git a/pkgs/applications/networking/instant-messengers/fluffychat/default.nix b/pkgs/applications/networking/instant-messengers/fluffychat/default.nix
index 22bbeb212f0..c07bd8e9fd4 100644
--- a/pkgs/applications/networking/instant-messengers/fluffychat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/fluffychat/default.nix
@@ -4,13 +4,19 @@
 , olm
 , imagemagick
 , makeDesktopItem
+, stdenv
 }:
 
+let vendorHashes = {
+  x86_64-linux = "sha256-Gi0mfxaMtPI/TxrxnvzQvH9M8CtLADKJfYO2JnzAz+Y=";
+  aarch64-linux = "sha256-iq8bMSJoYbDNtR82QunrpQdPUv0nceUKXRqAwDvxCpE=";
+};
+in
 flutter2.mkFlutterApp rec {
   pname = "fluffychat";
   version = "1.2.0";
 
-  vendorHash = "sha256-1PDX023WXRmRe/b1L+6Du91BvGwYNp3YATqYSQdPrRY=";
+  vendorHash = vendorHashes."${stdenv.hostPlatform.system}" or (throw "unsupported system: ${stdenv.hostPlatform.system}");
 
   src = fetchFromGitLab {
     owner = "famedly";
diff --git a/pkgs/development/compilers/flutter/default.nix b/pkgs/development/compilers/flutter/default.nix
index 02188335129..c264565e50a 100644
--- a/pkgs/development/compilers/flutter/default.nix
+++ b/pkgs/development/compilers/flutter/default.nix
@@ -11,7 +11,11 @@ let
       sources = {
         "${dartVersion}-x86_64-linux" = fetchurl {
           url = "https://storage.googleapis.com/dart-archive/channels/stable/release/${dartVersion}/sdk/dartsdk-linux-x64-release.zip";
-          sha256 = dartHash;
+          sha256 = dartHash.x86_64-linux;
+        };
+        "${dartVersion}-aarch64-linux" = fetchurl {
+          url = "https://storage.googleapis.com/dart-archive/channels/stable/release/${dartVersion}/sdk/dartsdk-linux-arm64-release.zip";
+          sha256 = dartHash.aarch64-linux;
         };
       };
     };
@@ -28,7 +32,10 @@ in
     version = "3.3.3";
     dartVersion = "2.18.2";
     hash = "sha256-MTZeWQUp4/TcPzYIT6eqIKSPUPvn2Mp/thOQzNgpTXg=";
-    dartHash = "sha256-C3+YjecXLvSmJrLwi9H7TgD9Np0AArRWx3EdBrfQpTU";
+    dartHash = {
+      x86_64-linux = "sha256-C3+YjecXLvSmJrLwi9H7TgD9Np0AArRWx3EdBrfQpTU";
+      aarch64-linux = "sha256-zyIK1i5/9P2C+sjzdArhFwpVO4P+It+/X50l+n9gekI=";
+    };
     patches = getPatches ./patches/flutter3;
   };
 
@@ -37,7 +44,10 @@ in
     version = "2.10.5";
     dartVersion = "2.16.2";
     hash = "sha256-DTZwxlMUYk8NS1SaWUJolXjD+JnRW73Ps5CdRHDGnt0=";
-    dartHash = "sha256-egrYd7B4XhkBiHPIFE2zopxKtQ58GqlogAKA/UeiXnI=";
+    dartHash = {
+      x86_64-linux = "sha256-egrYd7B4XhkBiHPIFE2zopxKtQ58GqlogAKA/UeiXnI=";
+      aarch64-linux = "sha256-vmerjXkUAUnI8FjK+62qLqgETmA+BLPEZXFxwYpI+KY=";
+    };
     patches = getPatches ./patches/flutter2;
   };
 }