diff --git a/packaging/dev-shell.nix b/packaging/dev-shell.nix
index 1b6c37f35..e824ebf71 100644
--- a/packaging/dev-shell.nix
+++ b/packaging/dev-shell.nix
@@ -72,10 +72,6 @@ pkgs.nixComponents.nix-util.overrideAttrs (
     src = null;
 
     env = {
-      # Needed for Meson to find Boost.
-      # https://github.com/NixOS/nixpkgs/issues/86131.
-      BOOST_INCLUDEDIR = "${lib.getDev pkgs.nixDependencies.boost}/include";
-      BOOST_LIBRARYDIR = "${lib.getLib pkgs.nixDependencies.boost}/lib";
       # For `make format`, to work without installing pre-commit
       _NIX_PRE_COMMIT_HOOKS_CONFIG = "${(pkgs.formats.yaml { }).generate "pre-commit-config.yaml"
         modular.pre-commit.settings.rawConfig
diff --git a/src/libcmd/meson.build b/src/libcmd/meson.build
index 4145f408a..114c099df 100644
--- a/src/libcmd/meson.build
+++ b/src/libcmd/meson.build
@@ -113,10 +113,15 @@ headers = [config_h] + files(
   'repl.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixcmd',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )
diff --git a/src/libexpr/meson.build b/src/libexpr/meson.build
index dffcc1742..fc04c4691 100644
--- a/src/libexpr/meson.build
+++ b/src/libexpr/meson.build
@@ -187,6 +187,9 @@ headers = [config_h] + files(
 
 subdir('primops')
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixexpr',
   sources,
@@ -194,6 +197,8 @@ this_library = library(
   lexer_tab,
   generated_headers,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )
diff --git a/src/libexpr/package.nix b/src/libexpr/package.nix
index 533dae9f2..141b77fac 100644
--- a/src/libexpr/package.nix
+++ b/src/libexpr/package.nix
@@ -81,13 +81,6 @@ mkMesonLibrary (finalAttrs: {
     (lib.mesonEnable "gc" enableGC)
   ];
 
-  env = {
-    # Needed for Meson to find Boost.
-    # https://github.com/NixOS/nixpkgs/issues/86131.
-    BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
-    BOOST_LIBRARYDIR = "${lib.getLib boost}/lib";
-  };
-
   meta = {
     platforms = lib.platforms.unix ++ lib.platforms.windows;
   };
diff --git a/src/libfetchers/meson.build b/src/libfetchers/meson.build
index 725254b56..f8efbc8d3 100644
--- a/src/libfetchers/meson.build
+++ b/src/libfetchers/meson.build
@@ -76,10 +76,15 @@ headers = files(
   'tarball.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixfetchers',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )
diff --git a/src/libflake/meson.build b/src/libflake/meson.build
index b757d0d76..27effe73c 100644
--- a/src/libflake/meson.build
+++ b/src/libflake/meson.build
@@ -58,10 +58,15 @@ headers = files(
   'flake/url-name.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixflake',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )
diff --git a/src/libmain/meson.build b/src/libmain/meson.build
index 00f945f49..6a0a22295 100644
--- a/src/libmain/meson.build
+++ b/src/libmain/meson.build
@@ -82,10 +82,15 @@ headers = [config_h] + files(
   'shared.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixmain',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )
diff --git a/src/libstore/meson.build b/src/libstore/meson.build
index 496c5b10d..1ea1f57bc 100644
--- a/src/libstore/meson.build
+++ b/src/libstore/meson.build
@@ -112,7 +112,8 @@ deps_public += nlohmann_json
 sqlite = dependency('sqlite3', 'sqlite', version : '>=3.6.19')
 deps_private += sqlite
 
-# AWS C++ SDK has bad pkg-config
+# AWS C++ SDK has bad pkg-config. See
+# https://github.com/aws/aws-sdk-cpp/issues/2673 for details.
 aws_s3 = dependency('aws-cpp-sdk-s3', required : false)
 configdata.set('ENABLE_S3', aws_s3.found().to_int())
 if aws_s3.found()
diff --git a/src/libstore/package.nix b/src/libstore/package.nix
index 31867d331..f992684df 100644
--- a/src/libstore/package.nix
+++ b/src/libstore/package.nix
@@ -21,6 +21,10 @@
   version,
 
   embeddedSandboxShell ? stdenv.hostPlatform.isStatic,
+
+  withAWS ?
+    # Default is this way because there have been issues building this dependency
+    stdenv.hostPlatform == stdenv.buildPlatform && (stdenv.isLinux || stdenv.isDarwin),
 }:
 
 let
@@ -60,9 +64,7 @@ mkMesonLibrary (finalAttrs: {
     ++ lib.optional stdenv.hostPlatform.isLinux libseccomp
     # There have been issues building these dependencies
     ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.libs.sandbox
-    ++ lib.optional (
-      stdenv.hostPlatform == stdenv.buildPlatform && (stdenv.isLinux || stdenv.isDarwin)
-    ) aws-sdk-cpp;
+    ++ lib.optional withAWS aws-sdk-cpp;
 
   propagatedBuildInputs = [
     nix-util
@@ -78,13 +80,6 @@ mkMesonLibrary (finalAttrs: {
       (lib.mesonOption "sandbox-shell" "${busybox-sandbox-shell}/bin/busybox")
     ];
 
-  env = {
-    # Needed for Meson to find Boost.
-    # https://github.com/NixOS/nixpkgs/issues/86131.
-    BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
-    BOOST_LIBRARYDIR = "${lib.getLib boost}/lib";
-  };
-
   meta = {
     platforms = lib.platforms.unix ++ lib.platforms.windows;
   };
diff --git a/src/libutil/package.nix b/src/libutil/package.nix
index a0b80ade7..8114dd645 100644
--- a/src/libutil/package.nix
+++ b/src/libutil/package.nix
@@ -58,13 +58,6 @@ mkMesonLibrary (finalAttrs: {
     (lib.mesonEnable "cpuid" stdenv.hostPlatform.isx86_64)
   ];
 
-  env = {
-    # Needed for Meson to find Boost.
-    # https://github.com/NixOS/nixpkgs/issues/86131.
-    BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
-    BOOST_LIBRARYDIR = "${lib.getLib boost}/lib";
-  };
-
   meta = {
     platforms = lib.platforms.unix ++ lib.platforms.windows;
   };