drush: still needs php 7.3

If invoked with php 7.4 on a up2date Drupal 7 installation, drush
complains with a deprecation warning, that swallows all legit output:

> drush uli
Deprecated function: Array and string offset access syntax with curly braces is   [error]
deprecated in include_once() (line 20 of
/var/www/…/htdocs/includes/file.phar.inc).

Use php7.3 when invoking drush.

1 files changed, 2 insertions, 2 deletions

diff --git a/pkgs/development/tools/misc/drush/default.nix b/pkgs/development/tools/misc/drush/default.nix
index 670c4e258f1..e0f85c45f29 100644
--- a/pkgs/development/tools/misc/drush/default.nix
+++ b/pkgs/development/tools/misc/drush/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, php, which, makeWrapper, bash, coreutils, ncurses }:
+{ stdenv, fetchurl, php73, which, makeWrapper, bash, coreutils, ncurses }:
 
 stdenv.mkDerivation rec {
   name = "drush-6.1.0";
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     mkdir -p "$out"
     cp -r . "$out/src"
     mkdir "$out/bin"
-    wrapProgram "$out/src/drush" --prefix PATH : "${stdenv.lib.makeBinPath [ which php bash coreutils ncurses ]}"
+    wrapProgram "$out/src/drush" --prefix PATH : "${stdenv.lib.makeBinPath [ which php73 bash coreutils ncurses ]}"
     ln -s "$out/src/drush" "$out/bin/drush"
   '';
 }