diff --git a/pkgs/by-name/ai/airshipper/package.nix b/pkgs/by-name/ai/airshipper/package.nix
index aba284758545..4731be7ce016 100644
--- a/pkgs/by-name/ai/airshipper/package.nix
+++ b/pkgs/by-name/ai/airshipper/package.nix
@@ -87,7 +87,7 @@ rustPlatform.buildRustPackage {
     makeWrapper
   ];
 
-  RUSTC_BOOTSTRAP = 1; # We need rust unstable features
+  env.RUSTC_BOOTSTRAP = 1; # We need rust unstable features
 
   postInstall = ''
     install -Dm444 -t "$out/share/applications" "client/assets/net.veloren.airshipper.desktop"
diff --git a/pkgs/by-name/ce/celeste/package.nix b/pkgs/by-name/ce/celeste/package.nix
index 911d3f54429a..e3535bf41e09 100644
--- a/pkgs/by-name/ce/celeste/package.nix
+++ b/pkgs/by-name/ce/celeste/package.nix
@@ -54,7 +54,7 @@ rustPlatform.buildRustPackage rec {
       --replace-warn 'edition = "2021"' 'edition = "2024"'
   '';
 
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   nativeBuildInputs = [
     just
diff --git a/pkgs/by-name/cn/cnsprcy/package.nix b/pkgs/by-name/cn/cnsprcy/package.nix
index 662df4a1f5ca..4e4f8778bef4 100644
--- a/pkgs/by-name/cn/cnsprcy/package.nix
+++ b/pkgs/by-name/cn/cnsprcy/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
 
   passthru.updateScript = ./update.sh;
 
-  RUSTC_BOOTSTRAP = true;
+  env.RUSTC_BOOTSTRAP = true;
   buildInputs = [ sqlite ];
 
   meta = {
diff --git a/pkgs/by-name/ew/eww/package.nix b/pkgs/by-name/ew/eww/package.nix
index 9f8739ea741f..8656401e6a45 100644
--- a/pkgs/by-name/ew/eww/package.nix
+++ b/pkgs/by-name/ew/eww/package.nix
@@ -47,7 +47,7 @@ rustPlatform.buildRustPackage rec {
   cargoTestFlags = cargoBuildFlags;
 
   # requires unstable rust features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd eww \
diff --git a/pkgs/by-name/fr/freshfetch/package.nix b/pkgs/by-name/fr/freshfetch/package.nix
index dd6b7510d7b9..d61bbb398d22 100644
--- a/pkgs/by-name/fr/freshfetch/package.nix
+++ b/pkgs/by-name/fr/freshfetch/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-LKltHVig33zUSWoRgCb1BgeKiJsDnlYEuPfQfrnhafI=";
 
   # freshfetch depends on rust nightly features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   meta = {
     description = "Fresh take on neofetch";
diff --git a/pkgs/by-name/fu/fuc/package.nix b/pkgs/by-name/fu/fuc/package.nix
index 6175f66772b3..bb6632c0f710 100644
--- a/pkgs/by-name/fu/fuc/package.nix
+++ b/pkgs/by-name/fu/fuc/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
 
   cargoHash = "sha256-OoTWGeF96BpPDx1Y9AEVOIBK7kCz6pjw24pLiNcKmOc=";
 
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   cargoBuildFlags = [
     "--workspace"
diff --git a/pkgs/by-name/hi/highlight-assertions/package.nix b/pkgs/by-name/hi/highlight-assertions/package.nix
index 50d48e31db33..4f03a55c63a6 100644
--- a/pkgs/by-name/hi/highlight-assertions/package.nix
+++ b/pkgs/by-name/hi/highlight-assertions/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-egrxcnDVKKgk1sL5WNMIR2FPwQbjjMy20VWizcTBEtM=";
 
   # requires nightly features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   meta = {
     description = "Tool for unit testing tree sitter highlights for nvim-treesitter";
diff --git a/pkgs/by-name/ho/holo-cli/package.nix b/pkgs/by-name/ho/holo-cli/package.nix
index 44dc53470480..e3efcf600528 100644
--- a/pkgs/by-name/ho/holo-cli/package.nix
+++ b/pkgs/by-name/ho/holo-cli/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
   passthru.updateScript = nix-update-script { extraArgs = [ "--version=branch" ]; };
 
   # Use rust nightly features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/by-name/ho/holo-daemon/package.nix b/pkgs/by-name/ho/holo-daemon/package.nix
index c71f737c54f8..10b86b93b7a1 100644
--- a/pkgs/by-name/ho/holo-daemon/package.nix
+++ b/pkgs/by-name/ho/holo-daemon/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
   cargoHash = "sha256-YZ2c6W6CCqgyN+6i7Vh5fWLKw8L4pUqvq/tDO/Q/kf0=";
 
   # Use rust nightly features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/by-name/ki/kind2/package.nix b/pkgs/by-name/ki/kind2/package.nix
index 34ae627b4597..c571fd6d0058 100644
--- a/pkgs/by-name/ki/kind2/package.nix
+++ b/pkgs/by-name/ki/kind2/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   '';
 
   # requires nightly features
-  RUSTC_BOOTSTRAP = true;
+  env.RUSTC_BOOTSTRAP = true;
 
   meta = {
     description = "Functional programming language and proof assistant";
diff --git a/pkgs/by-name/ko/kord/package.nix b/pkgs/by-name/ko/kord/package.nix
index ad3862b6f54f..682215044f71 100644
--- a/pkgs/by-name/ko/kord/package.nix
+++ b/pkgs/by-name/ko/kord/package.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
   version = "0.6.1";
 
   # kord depends on nightly features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   src = fetchFromGitHub {
     owner = "twitchax";
diff --git a/pkgs/by-name/ms/msedit/package.nix b/pkgs/by-name/ms/msedit/package.nix
index 8b9a2ed13745..3319b3e30d9a 100644
--- a/pkgs/by-name/ms/msedit/package.nix
+++ b/pkgs/by-name/ms/msedit/package.nix
@@ -19,14 +19,18 @@ rustPlatform.buildRustPackage (finalAttrs: {
   };
 
   cargoHash = "sha256-U8U70nzTmpY6r8J661EJ4CGjx6vWrGovu5m25dvz5sY=";
-  # Requires nightly features
-  env.RUSTC_BOOTSTRAP = 1;
 
-  # Without -headerpad, the following error occurs on x86_64-darwin
-  # error: install_name_tool: changing install names or rpaths can't be redone for: ... because larger updated load commands do not fit (the program must be relinked, and you may need to use -headerpad or -headerpad_max_install_names)
-  NIX_LDFLAGS = lib.optionals (with stdenv.hostPlatform; isDarwin && isx86_64) [
-    "-headerpad_max_install_names"
-  ];
+  # Requires nightly features
+  env = {
+    RUSTC_BOOTSTRAP = 1;
+    # Without -headerpad, the following error occurs on x86_64-darwin
+    # error: install_name_tool: changing install names or rpaths can't be redone for: ... because larger updated load commands do not fit (the program must be relinked, and you may need to use -headerpad or -headerpad_max_install_names)
+    NIX_LDFLAGS = toString (
+      lib.optionals (with stdenv.hostPlatform; isDarwin && isx86_64) [
+        "-headerpad_max_install_names"
+      ]
+    );
+  };
 
   buildInputs = [
     icu
diff --git a/pkgs/by-name/ni/nix-ld/package.nix b/pkgs/by-name/ni/nix-ld/package.nix
index 3c69baf06241..8290aaa03212 100644
--- a/pkgs/by-name/ni/nix-ld/package.nix
+++ b/pkgs/by-name/ni/nix-ld/package.nix
@@ -21,8 +21,10 @@ rustPlatform.buildRustPackage rec {
 
   hardeningDisable = [ "stackprotector" ];
 
-  NIX_SYSTEM = stdenv.system;
-  RUSTC_BOOTSTRAP = "1";
+  env = {
+    NIX_SYSTEM = stdenv.system;
+    RUSTC_BOOTSTRAP = "1";
+  };
 
   preCheck = ''
     export NIX_LD=${stdenv.cc.bintools.dynamicLinker}
diff --git a/pkgs/by-name/sh/shadow-tls/package.nix b/pkgs/by-name/sh/shadow-tls/package.nix
index 960372fdf6b5..f985456e6329 100644
--- a/pkgs/by-name/sh/shadow-tls/package.nix
+++ b/pkgs/by-name/sh/shadow-tls/package.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-1oJCdqBa1pWpQ7QvZ0vZaOd73R+SzR9OPf+yoI+RwCY=";
 
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   # network required
   doCheck = false;
diff --git a/pkgs/by-name/sy/syndicate-server/package.nix b/pkgs/by-name/sy/syndicate-server/package.nix
index 025b446e0e81..4f6219b3596a 100644
--- a/pkgs/by-name/sy/syndicate-server/package.nix
+++ b/pkgs/by-name/sy/syndicate-server/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   ];
   buildInputs = [ openssl ];
 
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   doCheck = false;
   doInstallCheck = true;
diff --git a/pkgs/by-name/un/unpfs/package.nix b/pkgs/by-name/un/unpfs/package.nix
index 4cf96dbdd0de..99d7d9662bdf 100644
--- a/pkgs/by-name/un/unpfs/package.nix
+++ b/pkgs/by-name/un/unpfs/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-jRe1lgzfhzBUsS6wwwlqxxomap2TIDOyF3YBv20GJ14=";
 
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   postInstall = ''
     install -D -m 0444 ../../README* -t "$out/share/doc/${pname}"
diff --git a/pkgs/development/compilers/rust/clippy.nix b/pkgs/development/compilers/rust/clippy.nix
index fa33c9e9f315..e5f1b3544f0b 100644
--- a/pkgs/development/compilers/rust/clippy.nix
+++ b/pkgs/development/compilers/rust/clippy.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage {
   buildInputs = [ rustc.llvm ];
 
   # fixes: error: the option `Z` is only accepted on the nightly compiler
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   # Without disabling the test the build fails with:
   # error: failed to run custom build command for `rustc_llvm v0.0.0
diff --git a/pkgs/development/compilers/rust/rustfmt.nix b/pkgs/development/compilers/rust/rustfmt.nix
index b002d665518a..0398dcc9fe0a 100644
--- a/pkgs/development/compilers/rust/rustfmt.nix
+++ b/pkgs/development/compilers/rust/rustfmt.nix
@@ -38,13 +38,15 @@ rustPlatform.buildRustPackage {
     install_name_tool -add_rpath "${rustc.unwrapped}/lib" "$out/bin/git-rustfmt"
   '';
 
-  # As of 1.0.0 and rustc 1.30 rustfmt requires a nightly compiler
-  RUSTC_BOOTSTRAP = 1;
+  env = {
+    # As of 1.0.0 and rustc 1.30 rustfmt requires a nightly compiler
+    RUSTC_BOOTSTRAP = 1;
 
-  # As of rustc 1.45.0, these env vars are required to build rustfmt (due to
-  # https://github.com/rust-lang/rust/pull/72001)
-  CFG_RELEASE = rustc.version;
-  CFG_RELEASE_CHANNEL = if asNightly then "nightly" else "stable";
+    # As of rustc 1.45.0, these env vars are required to build rustfmt (due to
+    # https://github.com/rust-lang/rust/pull/72001)
+    CFG_RELEASE = rustc.version;
+    CFG_RELEASE_CHANNEL = if asNightly then "nightly" else "stable";
+  };
 
   postInstall = ''
     wrapProgram $out/bin/cargo-fmt \