buf: use testVersion utility

`installCheckPhase` is mainly intended for checks that are part of the
upstream package, for our 'own' checks we prefer `passthru.tests`.

This loses running `buf --help`, but I'm not sure how much that adds
on top of `buf --version`?

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/build-support/trivial-builders.nix b/pkgs/build-support/trivial-builders.nix
index 6f51ba512c12b..7d4f18dcc2988 100644
--- a/pkgs/build-support/trivial-builders.nix
+++ b/pkgs/build-support/trivial-builders.nix
@@ -616,7 +616,7 @@ rec {
       command ? "${package.meta.mainProgram or package.pname or package.name} --version",
       version ? package.version,
     }: runCommand "test-version" { nativeBuildInputs = [ package ]; meta.timeout = 60; } ''
-      ${command} | grep -Fw ${version}
+      ${command} |& grep -Fw ${version}
       touch $out
     '';
 }