diff --git a/pkgs/build-support/rust/fetchCargoTarball.nix b/pkgs/build-support/rust/fetchCargoTarball.nix
index 3b36554e7075..2e8830b47574 100644
--- a/pkgs/build-support/rust/fetchCargoTarball.nix
+++ b/pkgs/build-support/rust/fetchCargoTarball.nix
@@ -36,9 +36,9 @@ in stdenv.mkDerivation ({
   name = "${name}-vendor.tar.gz";
   nativeBuildInputs = [ cacert git cargo-vendor-normalise cargo ];
 
-  phases = "unpackPhase patchPhase buildPhase installPhase";
-
   buildPhase = ''
+    runHook preBuild
+
     # Ensure deterministic Cargo vendor builds
     export SOURCE_DATE_EPOCH=1
 
@@ -69,6 +69,8 @@ in stdenv.mkDerivation ({
     # Packages with git dependencies generate non-default cargo configs, so
     # always install it rather than trying to write a standard default template.
     install -D $CARGO_CONFIG $name/.cargo/config;
+
+    runHook postBuild
   '';
 
   # Build a reproducible tar, per instructions at https://reproducible-builds.org/docs/archives/