diff --git a/pkgs/development/compilers/dart/default.nix b/pkgs/development/compilers/dart/default.nix
index 9851edf925498..87831cc8fa4ae 100644
--- a/pkgs/development/compilers/dart/default.nix
+++ b/pkgs/development/compilers/dart/default.nix
@@ -8,25 +8,43 @@
   runCommand,
   cctools,
   darwin,
-  sources ? import ./sources.nix { inherit fetchurl; },
-  version ? sources.versionUsed,
 }:
 
-assert sources != null && (builtins.isAttrs sources);
 stdenv.mkDerivation (finalAttrs: {
   pname = "dart";
-  inherit version;
-
-  nativeBuildInputs = [ unzip ];
+  version = "3.10.9";
 
   src =
-    sources."${version}-${stdenv.hostPlatform.system}"
-      or (throw "unsupported version/system: ${version}/${stdenv.hostPlatform.system}");
+    let
+      selectSystem =
+        attrs:
+        attrs.${stdenv.hostPlatform.system} or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
+      system = selectSystem {
+        x86_64-linux = "linux-x64";
+        aarch64-linux = "linux-arm64";
+        x86_64-darwin = "macos-x64";
+        aarch64-darwin = "macos-arm64";
+      };
+      hash = selectSystem {
+        x86_64-linux = "sha256-1DudOiG4LvKjfTGUW5nmuI9fjcROwZG0c/1inXjQuZQ=";
+        aarch64-linux = "sha256-Z8mPnmppTtPLNiY0Ny1pRzBAs3EoNtQsr82zxWwKBOs=";
+        x86_64-darwin = "sha256-pd37vWDOIKGdek/CuUSH7sVyiKqlLOW6GLT4IkzkwYA=";
+        aarch64-darwin = "sha256-99gMhvkzSJmYEsGuD3kBN1e3l685Xyy6cNICegC+Vk4=";
+      };
+    in
+    fetchurl {
+      url = "https://storage.googleapis.com/dart-archive/channels/${
+        if lib.strings.hasSuffix ".beta" finalAttrs.version then "beta" else "stable"
+      }/release/${finalAttrs.version}/sdk/dartsdk-${system}-release.zip";
+      inherit hash;
+    };
+
+  nativeBuildInputs = [ unzip ];
 
   installPhase = ''
     runHook preInstall
 
-    rm LICENSE
+    rm LICENSE README revision
     cp -R . $out
   ''
   + lib.optionalString (stdenv.hostPlatform.isLinux) ''
diff --git a/pkgs/development/compilers/dart/sources.nix b/pkgs/development/compilers/dart/sources.nix
deleted file mode 100644
index 7ca6da8b86b1b..0000000000000
--- a/pkgs/development/compilers/dart/sources.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-let
-  version = "3.10.7";
-in
-{ fetchurl }:
-{
-  versionUsed = version;
-  "${version}-x86_64-darwin" = fetchurl {
-    url = "https://storage.googleapis.com/dart-archive/channels/stable/release/${version}/sdk/dartsdk-macos-x64-release.zip";
-    hash = "sha256-EES4leNoHZWFs/nQUJTzN+cCKGzxiANpLJrkXb1UKdA=";
-  };
-  "${version}-aarch64-darwin" = fetchurl {
-    url = "https://storage.googleapis.com/dart-archive/channels/stable/release/${version}/sdk/dartsdk-macos-arm64-release.zip";
-    hash = "sha256-ovQkvU5BpqXHUlUebUKKranJUERhZPsAsfO3N+4jzKs=";
-  };
-  "${version}-aarch64-linux" = fetchurl {
-    url = "https://storage.googleapis.com/dart-archive/channels/stable/release/${version}/sdk/dartsdk-linux-arm64-release.zip";
-    hash = "sha256-gb3NiChgaYFxPFE+PUN37u3sQxxGvzXzJ3xquvLXvVE=";
-  };
-  "${version}-x86_64-linux" = fetchurl {
-    url = "https://storage.googleapis.com/dart-archive/channels/stable/release/${version}/sdk/dartsdk-linux-x64-release.zip";
-    hash = "sha256-ik7qz012kOAzidYygkG8aaG2HLmA8j1Q9i66y1kg7HQ=";
-  };
-}
diff --git a/pkgs/development/compilers/dart/update.sh b/pkgs/development/compilers/dart/update.sh
index e8cfc3b432a6d..afc3e2cc6c891 100755
--- a/pkgs/development/compilers/dart/update.sh
+++ b/pkgs/development/compilers/dart/update.sh
@@ -12,10 +12,10 @@ fi
 
 MY_PATH=$(dirname $(realpath "$0"))
 
-update-source-version dart $latestVersion --file=$MY_PATH/sources.nix
+update-source-version dart $latestVersion --file=$MY_PATH/default.nix
 
 systems=$(nix eval --json -f . dart.meta.platforms | jq --raw-output '.[]')
 for system in $systems; do
   hash=$(nix hash convert --to sri --hash-algo sha256 $(nix-prefetch-url $(nix eval --raw -f . dart.src.url --system "$system")))
-  update-source-version dart $latestVersion $hash --file=$MY_PATH/sources.nix --system=$system --ignore-same-version --ignore-same-hash
+  update-source-version dart $latestVersion $hash --file=$MY_PATH/default.nix --system=$system --ignore-same-version --ignore-same-hash
 done
diff --git a/pkgs/development/compilers/flutter/default.nix b/pkgs/development/compilers/flutter/default.nix
index 846173c1fe2a8..c8b2026c5f88a 100644
--- a/pkgs/development/compilers/flutter/default.nix
+++ b/pkgs/development/compilers/flutter/default.nix
@@ -50,30 +50,19 @@ let
           ;
 
         dart =
-          let
-            dartChannel = if lib.strings.hasSuffix ".beta" dartVersion then "beta" else "stable";
-          in
-          dart.override {
+          (dart.overrideAttrs (_: {
+            # This overrideAttrs is used to replace the version in src.url
             version = dartVersion;
-            sources = {
-              "${dartVersion}-x86_64-linux" = fetchzip {
-                url = "https://storage.googleapis.com/dart-archive/channels/${dartChannel}/release/${dartVersion}/sdk/dartsdk-linux-x64-release.zip";
-                hash = dartHash.x86_64-linux;
-              };
-              "${dartVersion}-aarch64-linux" = fetchzip {
-                url = "https://storage.googleapis.com/dart-archive/channels/${dartChannel}/release/${dartVersion}/sdk/dartsdk-linux-arm64-release.zip";
-                hash = dartHash.aarch64-linux;
-              };
-              "${dartVersion}-x86_64-darwin" = fetchzip {
-                url = "https://storage.googleapis.com/dart-archive/channels/${dartChannel}/release/${dartVersion}/sdk/dartsdk-macos-x64-release.zip";
-                hash = dartHash.x86_64-darwin;
+            __intentionallyOverridingVersion = true;
+          })).overrideAttrs
+            (oldAttrs: {
+              src = fetchzip {
+                inherit (oldAttrs.src) url;
+                hash =
+                  dartHash.${stdenv.hostPlatform.system}
+                    or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
               };
-              "${dartVersion}-aarch64-darwin" = fetchzip {
-                url = "https://storage.googleapis.com/dart-archive/channels/${dartChannel}/release/${dartVersion}/sdk/dartsdk-macos-arm64-release.zip";
-                hash = dartHash.aarch64-darwin;
-              };
-            };
-          };
+            });
         src =
           let
             source = fetchFromGitHub {