diff --git a/doc/languages-frameworks/rust.section.md b/doc/languages-frameworks/rust.section.md
index 5078de14d80f5..39a24856cd319 100644
--- a/doc/languages-frameworks/rust.section.md
+++ b/doc/languages-frameworks/rust.section.md
@@ -605,8 +605,8 @@ In some projects, the Rust crate is not in the main Python source
 directory.  In such cases, the `cargoRoot` attribute can be used to
 specify the crate's directory relative to `sourceRoot`. In the
 following example, the crate is in `src/rust`, as specified in the
-`cargoRoot` attribute. Note that we also need to specify the correct
-path for `fetchCargoVendor`.
+`cargoRoot` attribute. Note that we also need to pass in `cargoRoot`
+to `fetchCargoVendor`.
 
 ```nix
 {
@@ -627,8 +627,12 @@ buildPythonPackage rec {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version src;
-    sourceRoot = "${pname}-${version}/${cargoRoot}";
+    inherit
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-ctUt8maCjnGddKPf+Ii++wKsAXA1h+JM6zKQNXXwJqQ=";
   };
 
diff --git a/pkgs/applications/misc/openbangla-keyboard/default.nix b/pkgs/applications/misc/openbangla-keyboard/default.nix
index a059a14df05ae..b2239c5d38a84 100644
--- a/pkgs/applications/misc/openbangla-keyboard/default.nix
+++ b/pkgs/applications/misc/openbangla-keyboard/default.nix
@@ -62,11 +62,7 @@ stdenv.mkDerivation rec {
     ];
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit src;
-    postPatch = ''
-      cp ${./Cargo.lock} Cargo.lock
-    '';
-    sourceRoot = "${src.name}/${cargoRoot}";
+    inherit src cargoRoot postPatch;
     hash = "sha256-qZMTZi7eqEp5kSmVx7qdS7eDKOzSv9fMjWT0h/MGyeY=";
   };
 
diff --git a/pkgs/applications/science/electronics/librepcb/default.nix b/pkgs/applications/science/electronics/librepcb/default.nix
index 6a706e5a81c48..34b430b07e104 100644
--- a/pkgs/applications/science/electronics/librepcb/default.nix
+++ b/pkgs/applications/science/electronics/librepcb/default.nix
@@ -42,8 +42,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ qtbase ];
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit src;
-    sourceRoot = "source/${cargoRoot}";
+    inherit src cargoRoot;
     hash = "sha256-1td3WjxbDq2lX7c0trpYRhO82ChNAG/ZABBRsekYtq4=";
   };
 
diff --git a/pkgs/by-name/cc/ccextractor/package.nix b/pkgs/by-name/cc/ccextractor/package.nix
index ae94897395ff7..7c8fbb886b86c 100644
--- a/pkgs/by-name/cc/ccextractor/package.nix
+++ b/pkgs/by-name/cc/ccextractor/package.nix
@@ -49,10 +49,8 @@ stdenv.mkDerivation (finalAttrs: {
   cargoRoot = "src/rust";
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit (finalAttrs) src;
-    sourceRoot = "${finalAttrs.src.name}/${finalAttrs.cargoRoot}";
+    inherit (finalAttrs) src cargoRoot;
     patches = [ ./use-rsmpeg-0.15.patch ];
-    patchFlags = [ "-p3" ];
     hash = "sha256-7v3gQghByUDWZLJRRGa/7X2ivUumirq6BbexNQcCXCk=";
   };
 
diff --git a/pkgs/by-name/op/opengamepadui/package.nix b/pkgs/by-name/op/opengamepadui/package.nix
index 497f1e03eda13..e700d72d27e97 100644
--- a/pkgs/by-name/op/opengamepadui/package.nix
+++ b/pkgs/by-name/op/opengamepadui/package.nix
@@ -35,8 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit (finalAttrs) src;
-    sourceRoot = "source/${finalAttrs.cargoRoot}";
+    inherit (finalAttrs) src cargoRoot;
     hash = "sha256-T79G2bShJuFRfaCqG3IDHqW0s68yAdGyv58kdDYg6kg=";
   };
   cargoRoot = "extensions";
diff --git a/pkgs/by-name/su/surrealist/package.nix b/pkgs/by-name/su/surrealist/package.nix
index 175366a2c8feb..ac23727367507 100644
--- a/pkgs/by-name/su/surrealist/package.nix
+++ b/pkgs/by-name/su/surrealist/package.nix
@@ -60,8 +60,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit (finalAttrs) src;
-    sourceRoot = "${finalAttrs.src.name}/${finalAttrs.cargoRoot}";
+    inherit (finalAttrs) src cargoRoot;
     hash = "sha256-Su9ZOPIskV5poeS8pgtri+sZANBpdgnuCsQqE4WKFdA=";
   };
 
diff --git a/pkgs/by-name/we/wealthfolio/package.nix b/pkgs/by-name/we/wealthfolio/package.nix
index 4f8b7ac07fafb..56672781d4550 100644
--- a/pkgs/by-name/we/wealthfolio/package.nix
+++ b/pkgs/by-name/we/wealthfolio/package.nix
@@ -36,8 +36,12 @@ stdenv.mkDerivation (finalAttrs: {
   buildAndTestSubdir = finalAttrs.cargoRoot;
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit (finalAttrs) pname version src;
-    sourceRoot = "${finalAttrs.src.name}/${finalAttrs.cargoRoot}";
+    inherit (finalAttrs)
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-MmdvEutdkX98DgX1aVuxs4gabuMX5aM8yC4eqgvd8Q4=";
   };
 
diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index 48a5724b150b0..5e7357f2d01e4 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -216,8 +216,7 @@ let
           cargoDeps =
             if yjitSupport then
               rustPlatform.fetchCargoVendor {
-                inherit (finalAttrs) src;
-                sourceRoot = "${finalAttrs.pname}-${version}/${finalAttrs.cargoRoot}";
+                inherit (finalAttrs) src cargoRoot;
                 hash =
                   assert cargoHash != null;
                   cargoHash;
diff --git a/pkgs/development/python-modules/bcrypt/default.nix b/pkgs/development/python-modules/bcrypt/default.nix
index 9c83ab0c5b1be..fa49f45058fdb 100644
--- a/pkgs/development/python-modules/bcrypt/default.nix
+++ b/pkgs/development/python-modules/bcrypt/default.nix
@@ -33,8 +33,12 @@ buildPythonPackage rec {
 
   cargoRoot = "src/_bcrypt";
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version src;
-    sourceRoot = "${pname}-${version}/${cargoRoot}";
+    inherit
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-HgHvfMBspPsSYhllnKBg5XZB6zxFIqJj+4//xKG8HwA=";
   };
 
diff --git a/pkgs/development/python-modules/biliass/default.nix b/pkgs/development/python-modules/biliass/default.nix
index f58f280dae5e6..03a8c74936f5b 100644
--- a/pkgs/development/python-modules/biliass/default.nix
+++ b/pkgs/development/python-modules/biliass/default.nix
@@ -28,8 +28,9 @@ buildPythonPackage rec {
       pname
       version
       src
+      sourceRoot
+      cargoRoot
       ;
-    sourceRoot = "${sourceRoot}/${cargoRoot}";
     hash = "sha256-tkHl6z0En+od//fCGJXK/p8Dz5KDOXltHrXhxHmHL6U=";
   };
 
diff --git a/pkgs/development/python-modules/libcst/default.nix b/pkgs/development/python-modules/libcst/default.nix
index 5740deda9663a..58c7c5e677817 100644
--- a/pkgs/development/python-modules/libcst/default.nix
+++ b/pkgs/development/python-modules/libcst/default.nix
@@ -33,8 +33,12 @@ buildPythonPackage rec {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version src;
-    sourceRoot = "${src.name}/${cargoRoot}";
+    inherit
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-K8hug7JeLPIvrqgVaONKfixu8XRvn+pnqS0fHV+nTqg=";
   };
 
diff --git a/pkgs/development/python-modules/temporalio/default.nix b/pkgs/development/python-modules/temporalio/default.nix
index 63c45ee9f3f76..110d9a68b333a 100644
--- a/pkgs/development/python-modules/temporalio/default.nix
+++ b/pkgs/development/python-modules/temporalio/default.nix
@@ -33,8 +33,12 @@ buildPythonPackage rec {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version src;
-    sourceRoot = "${src.name}/${cargoRoot}";
+    inherit
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-9hP+zN6jcRmRhPmcZ4Zgp61IeS7gDPfsOvweAxKHnHM=";
   };
 
diff --git a/pkgs/kde/gear/akonadi-search/default.nix b/pkgs/kde/gear/akonadi-search/default.nix
index 7d46f87af0e18..03b37bb7bc7eb 100644
--- a/pkgs/kde/gear/akonadi-search/default.nix
+++ b/pkgs/kde/gear/akonadi-search/default.nix
@@ -14,9 +14,8 @@ mkKdeDerivation rec {
   cargoRoot = "agent/rs/htmlparser";
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version;
+    inherit pname version cargoRoot;
     src = sources.${pname};
-    sourceRoot = "${pname}-${version}/${cargoRoot}";
     hash = "sha256-hdm4LfQcs4TTfBLzlZYJ0uzqfLxMXuYQExLGJg81W2U=";
   };
 
diff --git a/pkgs/kde/gear/kdepim-addons/default.nix b/pkgs/kde/gear/kdepim-addons/default.nix
index b898e5d6410f0..edae47c991bc4 100644
--- a/pkgs/kde/gear/kdepim-addons/default.nix
+++ b/pkgs/kde/gear/kdepim-addons/default.nix
@@ -17,9 +17,8 @@ mkKdeDerivation rec {
   cargoRoot = "plugins/webengineurlinterceptor/adblock";
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version;
+    inherit pname version cargoRoot;
     src = sources.${pname};
-    sourceRoot = "${pname}-${version}/${cargoRoot}";
     hash = "sha256-66FqoD3JoPbtg6zc32uaPYaTo4zHxywiN8wPI2jtcjc=";
   };
 
diff --git a/pkgs/tools/filesystems/ceph/default.nix b/pkgs/tools/filesystems/ceph/default.nix
index 1e9b4618c1b6b..88c636048ab48 100644
--- a/pkgs/tools/filesystems/ceph/default.nix
+++ b/pkgs/tools/filesystems/ceph/default.nix
@@ -243,8 +243,12 @@ let
           };
           cargoRoot = "src/_bcrypt";
           cargoDeps = rustPlatform.fetchCargoVendor {
-            inherit pname version src;
-            sourceRoot = "${pname}-${version}/${cargoRoot}";
+            inherit
+              pname
+              version
+              src
+              cargoRoot
+              ;
             hash = "sha256-8PyCgh/rUO8uynzGdgylAsb5k55dP9fCnf40UOTCR/M=";
           };
         });
diff --git a/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix b/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix
index 0ecf97dc27b5f..5d82beffd690c 100644
--- a/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix
+++ b/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix
@@ -42,8 +42,12 @@ buildPythonPackage rec {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version src;
-    sourceRoot = "${pname}-${version}/${cargoRoot}";
+    inherit
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-pZHu3Oo9DWRAtldU0UvrH1FIg0bEvyfizPUhj9IBL58=";
   };