Something like this:

diff --git a/pkgs/build-support/php/hooks/composer-setup-hook.sh b/pkgs/build-support/php/hooks/composer-setup-hook.sh
index 90e51c3659a..1bbc0991f3f 100644
--- a/pkgs/build-support/php/hooks/composer-setup-hook.sh
+++ b/pkgs/build-support/php/hooks/composer-setup-hook.sh
@@ -44,6 +44,8 @@ composerSetupConfigureHook() {
 
 composerSetupBuildHook() {
     echo "Executing composerSetupBuildHook"
+    PATH_original="$PATH"
+    export PATH="@path@"
 
     # argstr=("--no-interaction" "--download-only")
 
@@ -73,6 +75,7 @@ composerSetupBuildHook() {
     composer-create-repository-python ${argstr[@]}
 
     echo "Finished composerSetupBuildHook"
+    export PATH="$PATH_original"
 }
 
 composerSetupInstallHook() {
diff --git a/pkgs/build-support/php/hooks/default.nix b/pkgs/build-support/php/hooks/default.nix
index 5f51c77b75a..02fa8ca3421 100644
--- a/pkgs/build-support/php/hooks/default.nix
+++ b/pkgs/build-support/php/hooks/default.nix
@@ -12,7 +12,7 @@
 
 let
   # Can be call with composer-create-repository-python [-h] [--include-dev] lockfile_path output_path
-  composerCreateRepositoryPythonScript = writers.makePythonWriter python311 python3Packages buildPackages.python3Packages "composer-create-repository-python" {
+  composerCreateRepositoryPythonScript = writers.makePythonWriter python311 python3Packages buildPackages.python3Packages "/bin/composer-create-repository-python" {
     flakeIgnore = ["E501"];
   } ./composer-create-repository.py;
 
@@ -24,7 +24,16 @@ in
 {
   composerSetupHook = makeSetupHook {
       name = "composer-setup-hook.sh";
-      propagatedBuildInputs = [ php unzip xz git jq composerCreateRepositoryPythonScript ];
+      substitutions = {
+        path = lib.makeBinPath [
+          php
+          unzip
+          xz
+          git
+          jq
+          composerCreateRepositoryPythonScript
+        ];
+      }
     } ./composer-setup-hook.sh;
 
   composerInstallHook = makeSetupHook {