diff --git a/flake.lock b/flake.lock
index f719ccbd..3a58f74d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -226,7 +226,8 @@
         "flake-compat": "flake-compat_2",
         "flake-utils": "flake-utils_2",
         "nix-filter": "nix-filter",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_2",
+        "rust-manifest": "rust-manifest"
       }
     },
     "rust-analyzer-src": {
@@ -246,6 +247,18 @@
         "type": "github"
       }
     },
+    "rust-manifest": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-aZFye4UrtlcvLHrISldx4g9uGt3thDbVlLMK5keBSj0=",
+        "type": "file",
+        "url": "https://static.rust-lang.org/dist/channel-rust-1.78.0.toml"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://static.rust-lang.org/dist/channel-rust-1.78.0.toml"
+      }
+    },
     "systems": {
       "locked": {
         "lastModified": 1681028828,
diff --git a/flake.nix b/flake.nix
index 51c50679..3a31a02f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,6 +8,12 @@
     flake-utils.url = "github:numtide/flake-utils?ref=main";
     nix-filter.url = "github:numtide/nix-filter?ref=main";
     nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
+
+    rust-manifest = {
+      # Keep version in sync with rust-toolchain.toml
+      url = "https://static.rust-lang.org/dist/channel-rust-1.78.0.toml";
+      flake = false;
+    };
   };
 
   outputs = inputs:
@@ -29,16 +35,27 @@
         shell = self.callPackage ./nix/shell.nix {};
 
         # The Rust toolchain to use
-        toolchain = inputs
-          .fenix
-          .packages
-          .${pkgs.pkgsBuildHost.system}
-          .fromToolchainFile {
-            file = ./rust-toolchain.toml;
-
-            # See also `rust-toolchain.toml`
-            sha256 = "sha256-opUgs6ckUQCyDxcB9Wy51pqhd0MPGHUVbwRKKPGiwZU=";
-          };
+        # Using fromManifestFile and parsing the toolchain file with importTOML
+        # instead of fromToolchainFile to avoid IFD
+        toolchain = let
+          toolchainFile = pkgs.lib.importTOML ./rust-toolchain.toml;
+          defaultProfileComponents = [
+            "rustc"
+            "cargo"
+            "rust-docs"
+            "rustfmt"
+            "clippy"
+          ];
+          components = defaultProfileComponents ++
+            toolchainFile.toolchain.components;
+          targets = toolchainFile.toolchain.targets;
+          fenix = inputs.fenix.packages.${pkgs.pkgsBuildHost.system};
+        in
+          fenix.combine (builtins.map
+            (target:
+              (fenix.targets.${target}.fromManifestFile inputs.rust-manifest)
+              .withComponents components)
+            targets);
       });
     in
     inputs.flake-utils.lib.eachDefaultSystem (system:
diff --git a/nix/pkgs/default/default.nix b/nix/pkgs/default/default.nix
index b03c2c50..fe31cc74 100644
--- a/nix/pkgs/default/default.nix
+++ b/nix/pkgs/default/default.nix
@@ -71,12 +71,10 @@ let
   } // buildDepsOnlyEnv;
 
   commonAttrs = {
-    inherit
-      (craneLib.crateNameFromCargoToml {
-        cargoToml = "${inputs.self}/Cargo.toml";
-      })
-      pname
-      version;
+    # Reading from cargoManifest directly instead of using
+    # createNameFromCargoToml to avoid IFD
+    pname = cargoManifest.package.name;
+    version = cargoManifest.package.version;
 
     src = let filter = inputs.nix-filter.lib; in filter {
       root = inputs.self;