diff --git a/pkgs/by-name/go/google-cloud-sdk/package.nix b/pkgs/by-name/go/google-cloud-sdk/package.nix
index e5c4399649a0..e7014c1a0037 100644
--- a/pkgs/by-name/go/google-cloud-sdk/package.nix
+++ b/pkgs/by-name/go/google-cloud-sdk/package.nix
@@ -87,6 +87,9 @@ stdenv.mkDerivation rec {
     ./gsutil-disable-updates.patch
   ];
 
+  # Prevent Python from writing bytecode to ensure build determinism
+  PYTHONDONTWRITEBYTECODE = "1";
+
   installPhase = ''
     runHook preInstall
 
@@ -161,8 +164,6 @@ stdenv.mkDerivation rec {
   installCheckPhase = ''
     # Avoid trying to write logs to homeless-shelter
     export HOME=$(mktemp -d)
-    # Prevent Python from writing bytecode to ensure build determinism
-    export PYTHONDONTWRITEBYTECODE=1
     $out/bin/gcloud version --format json | jq '."Google Cloud SDK"' | grep "${version}"
     $out/bin/gsutil version | grep -w "$(cat platform/gsutil/VERSION)"
   '';
diff --git a/pkgs/by-name/go/google-cloud-sdk/withExtraComponents.nix b/pkgs/by-name/go/google-cloud-sdk/withExtraComponents.nix
index e13ea25caac9..9d5a341105dc 100644
--- a/pkgs/by-name/go/google-cloud-sdk/withExtraComponents.nix
+++ b/pkgs/by-name/go/google-cloud-sdk/withExtraComponents.nix
@@ -78,11 +78,12 @@ symlinkJoin {
   ]
   ++ comps;
 
+  # Prevent Python from writing bytecode to ensure build determinism
+  PYTHONDONTWRITEBYTECODE = "1";
+
   postBuild = ''
     sed -i ';' $out/google-cloud-sdk/bin/.gcloud-wrapped
     sed -i -e "s#${google-cloud-sdk}#$out#" "$out/google-cloud-sdk/bin/gcloud"
-    # Prevent Python from writing bytecode to ensure build determinism
-    export PYTHONDONTWRITEBYTECODE=1
     ${installCheck}
   '';
 }