diff --git a/pkgs/os-specific/linux/kernel/manual-config.nix b/pkgs/os-specific/linux/kernel/manual-config.nix
index dde97da30c5f..a3a35a6b4585 100644
--- a/pkgs/os-specific/linux/kernel/manual-config.nix
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@@ -150,6 +150,10 @@ let
 
       RUST_LIB_SRC = lib.optionalString withRust rustPlatform.rustLibSrc;
 
+      # avoid leaking Rust source file names into the final binary, which adds
+      # a false dependency on rust-lib-src on targets with uncompressed kernels
+      KRUSTFLAGS = lib.optionalString withRust "--remap-path-prefix ${rustPlatform.rustLibSrc}=/";
+
       patches =
         map (p: p.patch) kernelPatches
         # Required for deterministic builds along with some postPatch magic.