diff --git a/pkgs/applications/science/machine-learning/shogun/default.nix b/pkgs/applications/science/machine-learning/shogun/default.nix
index c84b83ef4542..fd990735e6be 100644
--- a/pkgs/applications/science/machine-learning/shogun/default.nix
+++ b/pkgs/applications/science/machine-learning/shogun/default.nix
@@ -184,7 +184,7 @@ stdenv.mkDerivation (finalAttrs: {
       (lib.cmakeBool "CMAKE_DISABLE_FIND_PACKAGE_TFLogger" true)
       (lib.cmakeBool "CMAKE_DISABLE_FIND_PACKAGE_ViennaCL" true)
       (lib.cmakeFeature "CMAKE_CTEST_ARGUMENTS" "--exclude-regex;'${excludeTestsRegex}'")
-      (lib.cmakeBool "ENABLE_TESTING" finalAttrs.doCheck)
+      (lib.cmakeBool "ENABLE_TESTING" finalAttrs.finalPackage.doCheck)
       (lib.cmakeBool "DISABLE_META_INTEGRATION_TESTS" true)
       (lib.cmakeBool "TRAVIS_DISABLE_META_CPP" true)
       (lib.cmakeBool "INTERFACE_PYTHON" pythonSupport)
diff --git a/pkgs/applications/window-managers/i3/default.nix b/pkgs/applications/window-managers/i3/default.nix
index 02898df4e25f..267a7f1fbf13 100644
--- a/pkgs/applications/window-managers/i3/default.nix
+++ b/pkgs/applications/window-managers/i3/default.nix
@@ -102,7 +102,7 @@ stdenv.mkDerivation (finalAttrs: {
   # xvfb-run is available only on Linux
   doCheck = stdenv.hostPlatform.isLinux;
 
-  nativeCheckInputs = lib.optionals finalAttrs.doCheck [
+  nativeCheckInputs = lib.optionals finalAttrs.finalPackage.doCheck [
     xorgserver
     xvfb-run
     xdotool
diff --git a/pkgs/by-name/ar/arpack/package.nix b/pkgs/by-name/ar/arpack/package.nix
index b85f192a867d..dc0fb8d89efa 100644
--- a/pkgs/by-name/ar/arpack/package.nix
+++ b/pkgs/by-name/ar/arpack/package.nix
@@ -53,11 +53,11 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     (lib.cmakeBool "BUILD_SHARED_LIBS" stdenv.hostPlatform.hasSharedLibraries)
     (lib.cmakeBool "EIGEN" true)
-    (lib.cmakeBool "EXAMPLES" finalAttrs.doCheck)
+    (lib.cmakeBool "EXAMPLES" finalAttrs.finalPackage.doCheck)
     (lib.cmakeBool "ICB" true)
     (lib.cmakeBool "INTERFACE64" (!useAccel && blas.isILP64))
     (lib.cmakeBool "MPI" useMpi)
-    (lib.cmakeBool "TESTS" finalAttrs.doCheck)
+    (lib.cmakeBool "TESTS" finalAttrs.finalPackage.doCheck)
   ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DBLA_VENDOR=${if useAccel then "Apple" else "Generic"}"
   ];
diff --git a/pkgs/by-name/bl/blobdrop/package.nix b/pkgs/by-name/bl/blobdrop/package.nix
index 12c866b1d963..d067deb18c72 100644
--- a/pkgs/by-name/bl/blobdrop/package.nix
+++ b/pkgs/by-name/bl/blobdrop/package.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation (finalAttrs: {
     ];
 
   cmakeFlags = [
-    (lib.cmakeBool "BUILD_TESTING" finalAttrs.doCheck)
+    (lib.cmakeBool "BUILD_TESTING" finalAttrs.finalPackage.doCheck)
   ];
 
   doCheck = true;
diff --git a/pkgs/by-name/co/convmv/package.nix b/pkgs/by-name/co/convmv/package.nix
index 9d5be76625fe..9670d85dcd64 100644
--- a/pkgs/by-name/co/convmv/package.nix
+++ b/pkgs/by-name/co/convmv/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
   doCheck = !stdenv.hostPlatform.isDarwin;
 
   prePatch =
-    lib.optionalString finalAttrs.doCheck ''
+    lib.optionalString finalAttrs.finalPackage.doCheck ''
       tar -xf testsuite.tar
     ''
     + ''
diff --git a/pkgs/by-name/ge/gemrb/package.nix b/pkgs/by-name/ge/gemrb/package.nix
index 72ad54c18c0e..69d139328916 100644
--- a/pkgs/by-name/ge/gemrb/package.nix
+++ b/pkgs/by-name/ge/gemrb/package.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optionals (finalAttrs.doCheck or false) [ gtest ];
+  ] ++ lib.optionals (finalAttrs.finalPackage.doCheck or false) [ gtest ];
 
   cmakeFlags = [
     (lib.cmakeFeature "DATA_DIR" "${placeholder "out"}/share/gemrb")
@@ -79,7 +79,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeFeature "LAYOUT" "opt")
     (lib.cmakeFeature "OPENGL_BACKEND" backend)
     (lib.cmakeFeature "OpenGL_GL_PREFERENCE" "GLVND")
-    (lib.cmakeBool "USE_TESTS" (finalAttrs.doCheck or false))
+    (lib.cmakeBool "USE_TESTS" (finalAttrs.finalPackage.doCheck or false))
   ];
 
   postInstall = ''
diff --git a/pkgs/by-name/gl/glog/package.nix b/pkgs/by-name/gl/glog/package.nix
index 5474ecb2ed5c..58246c2f059f 100644
--- a/pkgs/by-name/gl/glog/package.nix
+++ b/pkgs/by-name/gl/glog/package.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation (finalAttrs: rec {
     sha256 = "sha256-+nwWP6VBmhgU7GCPSEGUzvUSCc48wXME181WpJ5ABP4=";
   };
 
-  postPatch = lib.optionalString finalAttrs.doCheck ''
+  postPatch = lib.optionalString finalAttrs.finalPackage.doCheck ''
     substituteInPlace src/logging_unittest.cc \
       --replace-warn "/usr/bin/true" "${pkgsBuildHost.coreutils}/bin/true"
   '';
diff --git a/pkgs/by-name/hd/hdf4/package.nix b/pkgs/by-name/hd/hdf4/package.nix
index c711432bea02..3e28f92cdd1d 100644
--- a/pkgs/by-name/hd/hdf4/package.nix
+++ b/pkgs/by-name/hd/hdf4/package.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
       (lib.cmakeBool "HDF4_ENABLE_SZIP_SUPPORT" szipSupport)
       (lib.cmakeBool "HDF4_ENABLE_SZIP_ENCODING" szipSupport)
       (lib.cmakeBool "HDF4_BUILD_JAVA" javaSupport)
-      (lib.cmakeBool "BUILD_TESTING" finalAttrs.doCheck)
+      (lib.cmakeBool "BUILD_TESTING" finalAttrs.finalPackage.doCheck)
     ]
     ++ lib.optionals javaSupport [
       (lib.cmakeFeature "JAVA_HOME" "${jdk}")
diff --git a/pkgs/by-name/li/lib2geom/package.nix b/pkgs/by-name/li/lib2geom/package.nix
index e40f82fdd73c..1168e7bc2384 100644
--- a/pkgs/by-name/li/lib2geom/package.nix
+++ b/pkgs/by-name/li/lib2geom/package.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     "-D2GEOM_BUILD_SHARED=ON"
     # For cross compilation.
-    (lib.cmakeBool "2GEOM_TESTING" finalAttrs.doCheck)
+    (lib.cmakeBool "2GEOM_TESTING" finalAttrs.finalPackage.doCheck)
   ];
 
   doCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
diff --git a/pkgs/by-name/li/libconfig/package.nix b/pkgs/by-name/li/libconfig/package.nix
index f0cc94171531..409a25de5483 100644
--- a/pkgs/by-name/li/libconfig/package.nix
+++ b/pkgs/by-name/li/libconfig/package.nix
@@ -20,9 +20,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   configureFlags =
     lib.optional (stdenv.hostPlatform.isWindows || stdenv.hostPlatform.isStatic) "--disable-examples"
-    ++ lib.optional (!finalAttrs.doCheck) "--disable-tests";
+    ++ lib.optional (!finalAttrs.finalPackage.doCheck) "--disable-tests";
 
-  cmakeFlags = lib.optionals (!finalAttrs.doCheck) [ "-DBUILD_TESTS:BOOL=OFF" ];
+  cmakeFlags = lib.optionals (!finalAttrs.finalPackage.doCheck) [ "-DBUILD_TESTS:BOOL=OFF" ];
 
   meta = {
     homepage = "https://hyperrealm.github.io/libconfig/";
diff --git a/pkgs/by-name/li/libkazv/package.nix b/pkgs/by-name/li/libkazv/package.nix
index f4d2afa5a317..e4206da49575 100644
--- a/pkgs/by-name/li/libkazv/package.nix
+++ b/pkgs/by-name/li/libkazv/package.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   strictDeps = true;
 
-  cmakeFlags = [ (lib.cmakeBool "libkazv_BUILD_TESTS" finalAttrs.doCheck) ];
+  cmakeFlags = [ (lib.cmakeBool "libkazv_BUILD_TESTS" finalAttrs.finalPackage.doCheck) ];
 
   doCheck = true;
 
diff --git a/pkgs/by-name/li/libloot/package.nix b/pkgs/by-name/li/libloot/package.nix
index 85b80c91a0e5..00765b5bbaf0 100644
--- a/pkgs/by-name/li/libloot/package.nix
+++ b/pkgs/by-name/li/libloot/package.nix
@@ -83,11 +83,11 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeFeature "LIBLOADORDER_LIBRARIES" "loadorder_ffi")
     (lib.cmakeFeature "LCI_LIBRARIES" "loot_condition_interpreter_ffi")
     (lib.cmakeFeature "FETCHCONTENT_SOURCE_DIR_TESTING-PLUGINS" "../testing-plugins")
-    (lib.cmakeBool "LIBLOOT_BUILD_TESTS" finalAttrs.doCheck)
+    (lib.cmakeBool "LIBLOOT_BUILD_TESTS" finalAttrs.finalPackage.doCheck)
     (lib.cmakeBool "LIBLOOT_INSTALL_DOCS" withDocs)
   ];
 
-  postConfigure = lib.optionalString finalAttrs.doCheck ''
+  postConfigure = lib.optionalString finalAttrs.finalPackage.doCheck ''
     cp -r --no-preserve=all ${finalAttrs.passthru.testing-plugins} ../testing-plugins
   '';
 
diff --git a/pkgs/by-name/li/libwacom/package.nix b/pkgs/by-name/li/libwacom/package.nix
index c3194db0d4b1..ffd0ab1c8e35 100644
--- a/pkgs/by-name/li/libwacom/package.nix
+++ b/pkgs/by-name/li/libwacom/package.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   mesonFlags = [
-    (lib.mesonEnable "tests" finalAttrs.doCheck)
+    (lib.mesonEnable "tests" finalAttrs.finalPackage.doCheck)
     (lib.mesonOption "sysconfdir" "/etc")
   ];
 
diff --git a/pkgs/by-name/lu/luanti/package.nix b/pkgs/by-name/lu/luanti/package.nix
index 4ad0536d5a9c..ee275ba8ad1b 100644
--- a/pkgs/by-name/lu/luanti/package.nix
+++ b/pkgs/by-name/lu/luanti/package.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     (lib.cmakeBool "BUILD_CLIENT" buildClient)
     (lib.cmakeBool "BUILD_SERVER" buildServer)
-    (lib.cmakeBool "BUILD_UNITTESTS" (finalAttrs.doCheck or false))
+    (lib.cmakeBool "BUILD_UNITTESTS" (finalAttrs.finalPackage.doCheck or false))
     (lib.cmakeBool "ENABLE_PROMETHEUS" buildServer)
     (lib.cmakeBool "USE_SDL2" useSDL2)
     # Ensure we use system libraries
diff --git a/pkgs/by-name/st/stp/package.nix b/pkgs/by-name/st/stp/package.nix
index b10553717239..65d8b52fb271 100644
--- a/pkgs/by-name/st/stp/package.nix
+++ b/pkgs/by-name/st/stp/package.nix
@@ -95,9 +95,9 @@ stdenv.mkDerivation (finalAttrs: {
       (lib.cmakeBool "USE_CADICAL" useCadical)
       (lib.cmakeBool "NOCRYPTOMINISAT" useCadical)
       (lib.cmakeBool "FORCE_CMS" (!useCadical))
-      (lib.cmakeBool "ENABLE_TESTING" finalAttrs.doCheck)
+      (lib.cmakeBool "ENABLE_TESTING" finalAttrs.finalPackage.doCheck)
     ]
-    ++ lib.optional finalAttrs.doCheck (lib.cmakeFeature "LIT_ARGS" "-v")
+    ++ lib.optional finalAttrs.finalPackage.doCheck (lib.cmakeFeature "LIT_ARGS" "-v")
     ++ lib.optional useCadical (lib.cmakeFeature "CADICAL_DIR" (toString cadicalDependency));
 
   # Fixes the following warning in the aarch64 build on Linux:
@@ -124,7 +124,7 @@ stdenv.mkDerivation (finalAttrs: {
         "-DPYTHON_LIB_INSTALL_DIR=$python_install_dir"
       )
     ''
-    + lib.optionalString finalAttrs.doCheck ''
+    + lib.optionalString finalAttrs.finalPackage.doCheck ''
       # Link in gtest and the output check utility.
       mkdir -p deps
       ln -s ${gtest.src} deps/gtest
diff --git a/pkgs/by-name/to/tomlplusplus/package.nix b/pkgs/by-name/to/tomlplusplus/package.nix
index 713eab450d1a..1dbdf62c90c6 100644
--- a/pkgs/by-name/to/tomlplusplus/package.nix
+++ b/pkgs/by-name/to/tomlplusplus/package.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   mesonFlags = [
-    "-Dbuild_tests=${lib.boolToString finalAttrs.doCheck}"
+    "-Dbuild_tests=${lib.boolToString finalAttrs.finalPackage.doCheck}"
     "-Dbuild_examples=true"
   ];
 
diff --git a/pkgs/development/compilers/flutter/engine/package.nix b/pkgs/development/compilers/flutter/engine/package.nix
index 4c10c665b023..96c4717bb8bd 100644
--- a/pkgs/development/compilers/flutter/engine/package.nix
+++ b/pkgs/development/compilers/flutter/engine/package.nix
@@ -265,8 +265,8 @@ stdenv.mkDerivation (finalAttrs: {
     ]
     ++ lib.optional (!isOptimized) "--unoptimized"
     ++ lib.optional (runtimeMode == "debug") "--no-stripped"
-    ++ lib.optional finalAttrs.doCheck "--enable-unittests"
-    ++ lib.optional (!finalAttrs.doCheck) "--no-enable-unittests";
+    ++ lib.optional finalAttrs.finalPackage.doCheck "--enable-unittests"
+    ++ lib.optional (!finalAttrs.finalPackage.doCheck) "--no-enable-unittests";
 
   # NOTE: Once https://github.com/flutter/flutter/issues/127606 is fixed, use "--no-prebuilt-dart-sdk"
   configurePhase =
@@ -318,7 +318,7 @@ stdenv.mkDerivation (finalAttrs: {
       find $out/out/$outName -name '*_unittests' -delete
       find $out/out/$outName -name '*_benchmarks' -delete
     ''
-    + lib.optionalString (finalAttrs.doCheck) ''
+    + lib.optionalString (finalAttrs.finalPackage.doCheck) ''
       rm $out/out/$outName/{display_list_rendertests,flutter_tester}
     ''
     + ''
diff --git a/pkgs/development/libraries/botan/default.nix b/pkgs/development/libraries/botan/default.nix
index 3de632e7b2be..0e482049b11a 100644
--- a/pkgs/development/libraries/botan/default.nix
+++ b/pkgs/development/libraries/botan/default.nix
@@ -64,7 +64,7 @@ let
 
       buildTargets =
         [ "cli" ]
-        ++ lib.optionals finalAttrs.doCheck [ "tests" ]
+        ++ lib.optionals finalAttrs.finalPackage.doCheck [ "tests" ]
         ++ lib.optionals static [ "static" ]
         ++ lib.optionals (!static) [ "shared" ];
 
diff --git a/pkgs/development/libraries/wayland/protocols.nix b/pkgs/development/libraries/wayland/protocols.nix
index 9ec92e7ea20c..32ef2b6e0d0d 100644
--- a/pkgs/development/libraries/wayland/protocols.nix
+++ b/pkgs/development/libraries/wayland/protocols.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-shcReTJHwsQnY5FDkt+p/LnjcoyktKoRCtuNkV/ABok=";
   };
 
-  postPatch = lib.optionalString finalAttrs.doCheck ''
+  postPatch = lib.optionalString finalAttrs.finalPackage.doCheck ''
     patchShebangs tests/
   '';
 
@@ -45,7 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
   checkInputs = [ wayland ];
   strictDeps = true;
 
-  mesonFlags = [ "-Dtests=${lib.boolToString finalAttrs.doCheck}" ];
+  mesonFlags = [ "-Dtests=${lib.boolToString finalAttrs.finalPackage.doCheck}" ];
 
   meta = {
     description = "Wayland protocol extensions";
diff --git a/pkgs/development/tools/database/sqlitebrowser/default.nix b/pkgs/development/tools/database/sqlitebrowser/default.nix
index bbd3453ce1ba..3f578ceb211f 100644
--- a/pkgs/development/tools/database/sqlitebrowser/default.nix
+++ b/pkgs/development/tools/database/sqlitebrowser/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   cmakeFlags = [
     "-Dsqlcipher=1"
-    (lib.cmakeBool "ENABLE_TESTING" (finalAttrs.doCheck or false))
+    (lib.cmakeBool "ENABLE_TESTING" (finalAttrs.finalPackage.doCheck or false))
   ];
 
   doCheck = true;
diff --git a/pkgs/tools/package-management/nix/2_26/src/perl/package.nix b/pkgs/tools/package-management/nix/2_26/src/perl/package.nix
index d95d13aa9213..5841570cd090 100644
--- a/pkgs/tools/package-management/nix/2_26/src/perl/package.nix
+++ b/pkgs/tools/package-management/nix/2_26/src/perl/package.nix
@@ -31,7 +31,7 @@ perl.pkgs.toPerlModule (
         ./meson.build
         ./meson.options
       ]
-      ++ lib.optionals finalAttrs.doCheck [
+      ++ lib.optionals finalAttrs.finalPackage.doCheck [
         ./.yath.rc.in
         ./t
       ]
@@ -70,7 +70,7 @@ perl.pkgs.toPerlModule (
     mesonFlags = [
       (lib.mesonOption "dbi_path" "${perlPackages.DBI}/${perl.libPrefix}")
       (lib.mesonOption "dbd_sqlite_path" "${perlPackages.DBDSQLite}/${perl.libPrefix}")
-      (lib.mesonEnable "tests" finalAttrs.doCheck)
+      (lib.mesonEnable "tests" finalAttrs.finalPackage.doCheck)
     ];
 
     mesonCheckFlags = [