diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 8fab66bb2aea5..a489871452c4c 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -2,9 +2,7 @@
   lib,
   config,
   stdenv,
-  aws-sdk-cpp,
-  boehmgc,
-  callPackage,
+  nixDependencies,
   generateSplicesForMkScope,
   fetchFromGitHub,
   fetchpatch2,
@@ -20,99 +18,22 @@
   confDir ? "/etc",
 }:
 let
-  boehmgc-nix_2_3 = boehmgc.override { enableLargeConfig = true; };
-
-  boehmgc-nix = boehmgc-nix_2_3.overrideAttrs (drv: {
-    patches = (drv.patches or [ ]) ++ [
-      # Part of the GC solution in https://github.com/NixOS/nix/pull/4944
-      ./patches/boehmgc-coroutine-sp-fallback.patch
-    ];
-  });
-
-  # old nix fails to build with newer aws-sdk-cpp and the patch doesn't apply
-  aws-sdk-cpp-old-nix =
-    (aws-sdk-cpp.override {
-      apis = [
-        "s3"
-        "transfer"
-      ];
-      customMemoryManagement = false;
-    }).overrideAttrs
-      (args: rec {
-        # intentionally overriding postPatch
-        version = "1.9.294";
-
-        src = fetchFromGitHub {
-          owner = "aws";
-          repo = "aws-sdk-cpp";
-          rev = version;
-          hash = "sha256-Z1eRKW+8nVD53GkNyYlZjCcT74MqFqqRMeMc33eIQ9g=";
-        };
-        postPatch =
-          ''
-            # Avoid blanket -Werror to evade build failures on less
-            # tested compilers.
-            substituteInPlace cmake/compiler_settings.cmake \
-              --replace '"-Werror"' ' '
-
-            # Missing includes for GCC11
-            sed '5i#include <thread>' -i \
-              aws-cpp-sdk-cloudfront-integration-tests/CloudfrontOperationTest.cpp \
-              aws-cpp-sdk-cognitoidentity-integration-tests/IdentityPoolOperationTest.cpp \
-              aws-cpp-sdk-dynamodb-integration-tests/TableOperationTest.cpp \
-              aws-cpp-sdk-elasticfilesystem-integration-tests/ElasticFileSystemTest.cpp \
-              aws-cpp-sdk-lambda-integration-tests/FunctionTest.cpp \
-              aws-cpp-sdk-mediastore-data-integration-tests/MediaStoreDataTest.cpp \
-              aws-cpp-sdk-queues/source/sqs/SQSQueue.cpp \
-              aws-cpp-sdk-redshift-integration-tests/RedshiftClientTest.cpp \
-              aws-cpp-sdk-s3-crt-integration-tests/BucketAndObjectOperationTest.cpp \
-              aws-cpp-sdk-s3-integration-tests/BucketAndObjectOperationTest.cpp \
-              aws-cpp-sdk-s3control-integration-tests/S3ControlTest.cpp \
-              aws-cpp-sdk-sqs-integration-tests/QueueOperationTest.cpp \
-              aws-cpp-sdk-transfer-tests/TransferTests.cpp
-            # Flaky on Hydra
-            rm aws-cpp-sdk-core-tests/aws/auth/AWSCredentialsProviderTest.cpp
-            # Includes aws-c-auth private headers, so only works with submodule build
-            rm aws-cpp-sdk-core-tests/aws/auth/AWSAuthSignerTest.cpp
-            # TestRandomURLMultiThreaded fails
-            rm aws-cpp-sdk-core-tests/http/HttpClientTest.cpp
-          ''
-          + lib.optionalString aws-sdk-cpp.stdenv.hostPlatform.isi686 ''
-            # EPSILON is exceeded
-            rm aws-cpp-sdk-core-tests/aws/client/AdaptiveRetryStrategyTest.cpp
-          '';
-
-        patches = (args.patches or [ ]) ++ [ ./patches/aws-sdk-cpp-TransferManager-ContentEncoding.patch ];
-
-        # only a stripped down version is build which takes a lot less resources to build
-        requiredSystemFeatures = [ ];
-      });
-
-  aws-sdk-cpp-nix =
-    (aws-sdk-cpp.override {
-      apis = [
-        "s3"
-        "transfer"
-      ];
-      customMemoryManagement = false;
-    }).overrideAttrs
-      {
-        # only a stripped down version is build which takes a lot less resources to build
-        requiredSystemFeatures = [ ];
-      };
 
+  # Called for Nix < 2.26
   common =
     args:
-    callPackage (import ./common.nix ({ inherit lib fetchFromGitHub; } // args)) {
+    nixDependencies.callPackage (import ./common.nix ({ inherit lib fetchFromGitHub; } // args)) {
       inherit
         Security
         storeDir
         stateDir
         confDir
         ;
-      boehmgc = boehmgc-nix;
       aws-sdk-cpp =
-        if lib.versionAtLeast args.version "2.12pre" then aws-sdk-cpp-nix else aws-sdk-cpp-old-nix;
+        if lib.versionAtLeast args.version "2.12pre" then
+          nixDependencies.aws-sdk-cpp
+        else
+          nixDependencies.aws-sdk-cpp-old;
     };
 
   # https://github.com/NixOS/nix/pull/7585
@@ -219,18 +140,15 @@ lib.makeExtensible (
   (
     {
       nix_2_3 =
-        (
-          (common {
-            version = "2.3.18";
-            hash = "sha256-jBz2Ub65eFYG+aWgSI3AJYvLSghio77fWQiIW1svA9U=";
-            patches = [
-              patch-monitorfdhup
-            ];
-            self_attribute_name = "nix_2_3";
-            maintainers = with lib.maintainers; [ flokli ];
-          }).override
-          { boehmgc = boehmgc-nix_2_3; }
-        ).overrideAttrs
+        (common {
+          version = "2.3.18";
+          hash = "sha256-jBz2Ub65eFYG+aWgSI3AJYvLSghio77fWQiIW1svA9U=";
+          patches = [
+            patch-monitorfdhup
+          ];
+          self_attribute_name = "nix_2_3";
+          maintainers = with lib.maintainers; [ flokli ];
+        }).overrideAttrs
           {
             # https://github.com/NixOS/nix/issues/10222
             # spurious test/add.sh failures
@@ -249,17 +167,36 @@ lib.makeExtensible (
         self_attribute_name = "nix_2_25";
       };
 
-      nixComponents_2_26 = (
-        callPackage ./vendor/2_26/componentized.nix {
-          inherit (self.nix_2_24.meta) maintainers;
-          otherSplices = generateSplicesForNixComponents "nixComponents_2_26";
-        }
-      );
+      nixComponents_2_26 = nixDependencies.callPackage ./modular/packages.nix {
+        version = "2.26.3";
+        inherit (self.nix_2_24.meta) maintainers;
+        otherSplices = generateSplicesForNixComponents "nixComponents_2_26";
+        src = fetchFromGitHub {
+          owner = "NixOS";
+          repo = "nix";
+          rev = "42fc03dd1f12df2d9152303f3fb8bf22b746462c";
+          hash = "sha256-5ZV8YqU8mfFmoAMiUEuBqNwk0T3vUR//x1D12BiYCeY=";
+        };
+      };
 
       # Note, this might eventually become an alias, as packages should
       # depend on the components they need in `nixComponents_2_26`.
       nix_2_26 = addTests "nix_2_26" self.nixComponents_2_26.nix-everything;
 
+      nixComponents_2_27 = nixDependencies.callPackage ./modular/packages.nix {
+        version = "2.27.1";
+        inherit (self.nix_2_24.meta) maintainers;
+        otherSplices = generateSplicesForNixComponents "nixComponents_2_26";
+        src = fetchFromGitHub {
+          owner = "NixOS";
+          repo = "nix";
+          rev = "9cb662df7442a1e2c4600fb8ecb2ad613ebc5a95";
+          hash = "sha256-rBPulEBpn4IiqkPsetuh7BRzT2iGCzZYnogTAsbrvhU=";
+        };
+      };
+
+      nix_2_27 = addTests "nix_2_27" self.nixComponents_2_27.nix-everything;
+
       latest = self.nix_2_26;
 
       # The minimum Nix version supported by Nixpkgs
diff --git a/pkgs/tools/package-management/nix/dependencies-scope.nix b/pkgs/tools/package-management/nix/dependencies-scope.nix
new file mode 100644
index 0000000000000..cb562dad35050
--- /dev/null
+++ b/pkgs/tools/package-management/nix/dependencies-scope.nix
@@ -0,0 +1,22 @@
+{
+  lib,
+  generateSplicesForMkScope,
+  newScope,
+  splicePackages,
+  callPackage,
+}:
+
+let
+  otherSplices = generateSplicesForMkScope [ "nixDependencies" ];
+in
+lib.makeScopeWithSplicing'
+  {
+    inherit splicePackages;
+    inherit newScope; # layered directly on pkgs, unlike nixComponents above
+  }
+  {
+    # Technically this should point to the nixDependencies set only, but
+    # this is ok as long as the scopes don't intersect.
+    inherit otherSplices;
+    f = (callPackage ./dependencies.nix { }).scopeFunction;
+  }
diff --git a/pkgs/tools/package-management/nix/dependencies.nix b/pkgs/tools/package-management/nix/dependencies.nix
new file mode 100644
index 0000000000000..a1a964836959f
--- /dev/null
+++ b/pkgs/tools/package-management/nix/dependencies.nix
@@ -0,0 +1,102 @@
+regular@{
+  lib,
+  boehmgc,
+  aws-sdk-cpp,
+  fetchFromGitHub,
+  pkgs,
+  stdenv,
+}:
+
+let
+  stdenv =
+    if regular.stdenv.isDarwin && regular.stdenv.isx86_64 then darwinStdenv else regular.stdenv;
+
+  # Fix the following error with the default x86_64-darwin SDK:
+  #
+  #     error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
+  #
+  # Despite the use of the 10.13 deployment target here, the aligned
+  # allocation function Clang uses with this setting actually works
+  # all the way back to 10.6.
+  darwinStdenv = regular.pkgs.overrideSDK regular.stdenv { darwinMinVersion = "10.13"; };
+in
+
+{
+  scopeFunction = scope: {
+    inherit stdenv;
+
+    boehmgc = regular.boehmgc.override { enableLargeConfig = true; };
+
+    # old nix fails to build with newer aws-sdk-cpp and the patch doesn't apply
+    aws-sdk-cpp-old =
+      (regular.aws-sdk-cpp.override {
+        apis = [
+          "s3"
+          "transfer"
+        ];
+        customMemoryManagement = false;
+      }).overrideAttrs
+        (args: rec {
+          # intentionally overriding postPatch
+          version = "1.9.294";
+
+          src = fetchFromGitHub {
+            owner = "aws";
+            repo = "aws-sdk-cpp";
+            rev = version;
+            hash = "sha256-Z1eRKW+8nVD53GkNyYlZjCcT74MqFqqRMeMc33eIQ9g=";
+          };
+          postPatch =
+            ''
+              # Avoid blanket -Werror to evade build failures on less
+              # tested compilers.
+              substituteInPlace cmake/compiler_settings.cmake \
+                --replace '"-Werror"' ' '
+
+              # Missing includes for GCC11
+              sed '5i#include <thread>' -i \
+                aws-cpp-sdk-cloudfront-integration-tests/CloudfrontOperationTest.cpp \
+                aws-cpp-sdk-cognitoidentity-integration-tests/IdentityPoolOperationTest.cpp \
+                aws-cpp-sdk-dynamodb-integration-tests/TableOperationTest.cpp \
+                aws-cpp-sdk-elasticfilesystem-integration-tests/ElasticFileSystemTest.cpp \
+                aws-cpp-sdk-lambda-integration-tests/FunctionTest.cpp \
+                aws-cpp-sdk-mediastore-data-integration-tests/MediaStoreDataTest.cpp \
+                aws-cpp-sdk-queues/source/sqs/SQSQueue.cpp \
+                aws-cpp-sdk-redshift-integration-tests/RedshiftClientTest.cpp \
+                aws-cpp-sdk-s3-crt-integration-tests/BucketAndObjectOperationTest.cpp \
+                aws-cpp-sdk-s3-integration-tests/BucketAndObjectOperationTest.cpp \
+                aws-cpp-sdk-s3control-integration-tests/S3ControlTest.cpp \
+                aws-cpp-sdk-sqs-integration-tests/QueueOperationTest.cpp \
+                aws-cpp-sdk-transfer-tests/TransferTests.cpp
+              # Flaky on Hydra
+              rm aws-cpp-sdk-core-tests/aws/auth/AWSCredentialsProviderTest.cpp
+              # Includes aws-c-auth private headers, so only works with submodule build
+              rm aws-cpp-sdk-core-tests/aws/auth/AWSAuthSignerTest.cpp
+              # TestRandomURLMultiThreaded fails
+              rm aws-cpp-sdk-core-tests/http/HttpClientTest.cpp
+            ''
+            + lib.optionalString aws-sdk-cpp.stdenv.hostPlatform.isi686 ''
+              # EPSILON is exceeded
+              rm aws-cpp-sdk-core-tests/aws/client/AdaptiveRetryStrategyTest.cpp
+            '';
+
+          patches = (args.patches or [ ]) ++ [ ./patches/aws-sdk-cpp-TransferManager-ContentEncoding.patch ];
+
+          # only a stripped down version is build which takes a lot less resources to build
+          requiredSystemFeatures = [ ];
+        });
+
+    aws-sdk-cpp =
+      (regular.aws-sdk-cpp.override {
+        apis = [
+          "s3"
+          "transfer"
+        ];
+        customMemoryManagement = false;
+      }).overrideAttrs
+        {
+          # only a stripped down version is build which takes a lot less resources to build
+          requiredSystemFeatures = [ ];
+        };
+  };
+}
diff --git a/pkgs/tools/package-management/nix/modular/README.md b/pkgs/tools/package-management/nix/modular/README.md
new file mode 100644
index 0000000000000..247bfc8badc5d
--- /dev/null
+++ b/pkgs/tools/package-management/nix/modular/README.md
@@ -0,0 +1,6 @@
+# `nix/modular`
+
+This directory follows a directory structure similar to that in the upstream repo,
+to make comparisons easier.
+
+The files are maintained separately from the upstream repo, so differences are expected.
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/doc/manual/package.nix b/pkgs/tools/package-management/nix/modular/doc/manual/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/doc/manual/package.nix
rename to pkgs/tools/package-management/nix/modular/doc/manual/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/componentized.nix b/pkgs/tools/package-management/nix/modular/packages.nix
similarity index 50%
rename from pkgs/tools/package-management/nix/vendor/2_26/componentized.nix
rename to pkgs/tools/package-management/nix/modular/packages.nix
index 21b16a98f241c..d051dc6d716d1 100644
--- a/pkgs/tools/package-management/nix/vendor/2_26/componentized.nix
+++ b/pkgs/tools/package-management/nix/modular/packages.nix
@@ -1,17 +1,15 @@
 {
   lib,
-  fetchFromGitHub,
   splicePackages,
-  generateSplicesForMkScope,
-  newScope,
+  nixDependencies,
   pkgs,
-  stdenv,
   maintainers,
   otherSplices,
+  version,
+  src,
 }:
 let
   officialRelease = true;
-  src = fetchFromGitHub (builtins.fromJSON (builtins.readFile ./source.json));
 
   # A new scope, so that we can use `callPackage` to inject our own interdependencies
   # without "polluting" the top level "`pkgs`" attrset.
@@ -32,26 +30,10 @@ let
             officialRelease
             pkgs
             src
+            version
             ;
         };
       };
 
-  # The dependencies are in their own scope, so that they don't have to be
-  # in Nixpkgs top level `pkgs` or `nixComponents`.
-  nixDependencies =
-    lib.makeScopeWithSplicing'
-      {
-        inherit splicePackages;
-        inherit newScope; # layered directly on pkgs, unlike nixComponents above
-      }
-      {
-        # Technically this should point to the nixDependencies set only, but
-        # this is ok as long as the scopes don't intersect.
-        inherit otherSplices;
-        f = import ./dependencies.nix {
-          inherit pkgs;
-          inherit stdenv;
-        };
-      };
 in
 nixComponents.overrideSource src
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/packaging/components.nix b/pkgs/tools/package-management/nix/modular/packaging/components.nix
similarity index 99%
rename from pkgs/tools/package-management/nix/vendor/2_26/packaging/components.nix
rename to pkgs/tools/package-management/nix/modular/packaging/components.nix
index 77cf9c9a50652..db53ff87555df 100644
--- a/pkgs/tools/package-management/nix/vendor/2_26/packaging/components.nix
+++ b/pkgs/tools/package-management/nix/modular/packaging/components.nix
@@ -4,6 +4,7 @@
   src,
   officialRelease,
   maintainers,
+  version,
 }:
 
 scope:
@@ -27,7 +28,7 @@ let
     pkg-config
     ;
 
-  baseVersion = lib.fileContents ../.version;
+  baseVersion = version;
 
   versionSuffix = lib.optionalString (!officialRelease) "pre";
 
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/packaging/everything.nix b/pkgs/tools/package-management/nix/modular/packaging/everything.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/packaging/everything.nix
rename to pkgs/tools/package-management/nix/modular/packaging/everything.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/external-api-docs/package.nix b/pkgs/tools/package-management/nix/modular/src/external-api-docs/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/external-api-docs/package.nix
rename to pkgs/tools/package-management/nix/modular/src/external-api-docs/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/internal-api-docs/package.nix b/pkgs/tools/package-management/nix/modular/src/internal-api-docs/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/internal-api-docs/package.nix
rename to pkgs/tools/package-management/nix/modular/src/internal-api-docs/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libcmd/package.nix b/pkgs/tools/package-management/nix/modular/src/libcmd/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libcmd/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libcmd/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libexpr-c/package.nix b/pkgs/tools/package-management/nix/modular/src/libexpr-c/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libexpr-c/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libexpr-c/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libexpr-test-support/package.nix b/pkgs/tools/package-management/nix/modular/src/libexpr-test-support/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libexpr-test-support/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libexpr-test-support/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libexpr-tests/package.nix b/pkgs/tools/package-management/nix/modular/src/libexpr-tests/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libexpr-tests/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libexpr-tests/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libexpr/package.nix b/pkgs/tools/package-management/nix/modular/src/libexpr/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libexpr/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libexpr/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libfetchers-tests/package.nix b/pkgs/tools/package-management/nix/modular/src/libfetchers-tests/package.nix
similarity index 87%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libfetchers-tests/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libfetchers-tests/package.nix
index 1e379fc5ade24..f6659130152e3 100644
--- a/pkgs/tools/package-management/nix/vendor/2_26/src/libfetchers-tests/package.nix
+++ b/pkgs/tools/package-management/nix/modular/src/libfetchers-tests/package.nix
@@ -7,6 +7,7 @@
   nix-fetchers,
   nix-store-test-support,
 
+  libgit2,
   rapidcheck,
   gtest,
   runCommand,
@@ -37,12 +38,16 @@ mkMesonExecutable (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  buildInputs = [
-    nix-fetchers
-    nix-store-test-support
-    rapidcheck
-    gtest
-  ];
+  buildInputs =
+    [
+      nix-fetchers
+      nix-store-test-support
+      rapidcheck
+      gtest
+    ]
+    ++ lib.optionals (lib.versionAtLeast version "2.27") [
+      libgit2
+    ];
 
   mesonFlags = [
   ];
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libfetchers/package.nix b/pkgs/tools/package-management/nix/modular/src/libfetchers/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libfetchers/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libfetchers/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libflake-c/package.nix b/pkgs/tools/package-management/nix/modular/src/libflake-c/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libflake-c/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libflake-c/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libflake-tests/package.nix b/pkgs/tools/package-management/nix/modular/src/libflake-tests/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libflake-tests/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libflake-tests/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libflake/package.nix b/pkgs/tools/package-management/nix/modular/src/libflake/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libflake/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libflake/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libmain-c/package.nix b/pkgs/tools/package-management/nix/modular/src/libmain-c/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libmain-c/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libmain-c/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libmain/package.nix b/pkgs/tools/package-management/nix/modular/src/libmain/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libmain/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libmain/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libstore-c/package.nix b/pkgs/tools/package-management/nix/modular/src/libstore-c/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libstore-c/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libstore-c/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libstore-test-support/package.nix b/pkgs/tools/package-management/nix/modular/src/libstore-test-support/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libstore-test-support/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libstore-test-support/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libstore-tests/package.nix b/pkgs/tools/package-management/nix/modular/src/libstore-tests/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libstore-tests/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libstore-tests/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libstore/package.nix b/pkgs/tools/package-management/nix/modular/src/libstore/package.nix
similarity index 96%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libstore/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libstore/package.nix
index 31867d331b92b..bba96e07f3125 100644
--- a/pkgs/tools/package-management/nix/vendor/2_26/src/libstore/package.nix
+++ b/pkgs/tools/package-management/nix/modular/src/libstore/package.nix
@@ -78,7 +78,7 @@ mkMesonLibrary (finalAttrs: {
       (lib.mesonOption "sandbox-shell" "${busybox-sandbox-shell}/bin/busybox")
     ];
 
-  env = {
+  env = lib.optionalAttrs (!lib.versionAtLeast version "2.27") {
     # Needed for Meson to find Boost.
     # https://github.com/NixOS/nixpkgs/issues/86131.
     BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libutil-c/package.nix b/pkgs/tools/package-management/nix/modular/src/libutil-c/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libutil-c/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libutil-c/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libutil-test-support/package.nix b/pkgs/tools/package-management/nix/modular/src/libutil-test-support/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libutil-test-support/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libutil-test-support/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libutil-tests/package.nix b/pkgs/tools/package-management/nix/modular/src/libutil-tests/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libutil-tests/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libutil-tests/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/libutil/package.nix b/pkgs/tools/package-management/nix/modular/src/libutil/package.nix
similarity index 78%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/libutil/package.nix
rename to pkgs/tools/package-management/nix/modular/src/libutil/package.nix
index 47dcb54a26f85..e389fd59439c4 100644
--- a/pkgs/tools/package-management/nix/vendor/2_26/src/libutil/package.nix
+++ b/pkgs/tools/package-management/nix/modular/src/libutil/package.nix
@@ -6,6 +6,7 @@
   boost,
   brotli,
   libarchive,
+  libblake3,
   libcpuid,
   libsodium,
   nlohmann_json,
@@ -40,11 +41,18 @@ mkMesonLibrary (finalAttrs: {
     (fileset.fileFilter (file: file.hasExt "hh") ./.)
   ];
 
-  buildInputs = [
-    brotli
-    libsodium
-    openssl
-  ] ++ lib.optional stdenv.hostPlatform.isx86_64 libcpuid;
+  buildInputs =
+    [
+      brotli
+    ]
+    ++ lib.optional (lib.versionAtLeast version "2.27") [
+      libblake3
+    ]
+    ++ [
+      libsodium
+      openssl
+    ]
+    ++ lib.optional stdenv.hostPlatform.isx86_64 libcpuid;
 
   propagatedBuildInputs = [
     boost
@@ -56,7 +64,7 @@ mkMesonLibrary (finalAttrs: {
     (lib.mesonEnable "cpuid" stdenv.hostPlatform.isx86_64)
   ];
 
-  env = {
+  env = lib.optionalAttrs (!lib.versionAtLeast version "2.27") {
     # Needed for Meson to find Boost.
     # https://github.com/NixOS/nixpkgs/issues/86131.
     BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/nix/package.nix b/pkgs/tools/package-management/nix/modular/src/nix/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/nix/package.nix
rename to pkgs/tools/package-management/nix/modular/src/nix/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/src/perl/package.nix b/pkgs/tools/package-management/nix/modular/src/perl/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/src/perl/package.nix
rename to pkgs/tools/package-management/nix/modular/src/perl/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/tests/functional/package.nix b/pkgs/tools/package-management/nix/modular/tests/functional/package.nix
similarity index 100%
rename from pkgs/tools/package-management/nix/vendor/2_26/tests/functional/package.nix
rename to pkgs/tools/package-management/nix/modular/tests/functional/package.nix
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/.version b/pkgs/tools/package-management/nix/vendor/2_26/.version
deleted file mode 100644
index 90f3e72b6118a..0000000000000
--- a/pkgs/tools/package-management/nix/vendor/2_26/.version
+++ /dev/null
@@ -1 +0,0 @@
-2.26.3
\ No newline at end of file
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/dependencies.nix b/pkgs/tools/package-management/nix/vendor/2_26/dependencies.nix
deleted file mode 100644
index 0e874d990188c..0000000000000
--- a/pkgs/tools/package-management/nix/vendor/2_26/dependencies.nix
+++ /dev/null
@@ -1,46 +0,0 @@
-# These overrides are applied to the dependencies of the Nix components.
-
-{
-  # The raw Nixpkgs, not affected by this scope
-  pkgs,
-
-  stdenv,
-}:
-
-let
-  prevStdenv = stdenv;
-in
-
-let
-  stdenv = if prevStdenv.isDarwin && prevStdenv.isx86_64 then darwinStdenv else prevStdenv;
-
-  # Fix the following error with the default x86_64-darwin SDK:
-  #
-  #     error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
-  #
-  # Despite the use of the 10.13 deployment target here, the aligned
-  # allocation function Clang uses with this setting actually works
-  # all the way back to 10.6.
-  darwinStdenv = pkgs.overrideSDK prevStdenv { darwinMinVersion = "10.13"; };
-in
-scope: {
-  inherit stdenv;
-
-  aws-sdk-cpp =
-    (pkgs.aws-sdk-cpp.override {
-      apis = [
-        "s3"
-        "transfer"
-      ];
-      customMemoryManagement = false;
-    }).overrideAttrs
-      {
-        # only a stripped down version is built, which takes a lot less resources
-        # to build, so we don't need a "big-parallel" machine.
-        requiredSystemFeatures = [ ];
-      };
-
-  boehmgc = pkgs.boehmgc.override {
-    enableLargeConfig = true;
-  };
-}
diff --git a/pkgs/tools/package-management/nix/vendor/2_26/source.json b/pkgs/tools/package-management/nix/vendor/2_26/source.json
deleted file mode 100644
index e8070d9b0dd19..0000000000000
--- a/pkgs/tools/package-management/nix/vendor/2_26/source.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-    "owner": "NixOS",
-    "repo": "nix",
-    "rev": "42fc03dd1f12df2d9152303f3fb8bf22b746462c",
-    "hash": "sha256-5ZV8YqU8mfFmoAMiUEuBqNwk0T3vUR//x1D12BiYCeY="
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 01cee5c744ab6..5f59def548306 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18894,6 +18894,10 @@ with pkgs;
 
   muse = libsForQt5.callPackage ../applications/audio/muse { };
 
+  nixDependencies = recurseIntoAttrs (
+    callPackage ../tools/package-management/nix/dependencies-scope.nix { }
+  );
+
   nixVersions = recurseIntoAttrs (
     callPackage ../tools/package-management/nix {
       storeDir = config.nix.storeDir or "/nix/store";