diff --git a/module/src/main/cpp/zygisk/main.cpp b/module/src/main/cpp/zygisk/main.cpp
index 0719cce..22a0e31 100644
--- a/module/src/main/cpp/zygisk/main.cpp
+++ b/module/src/main/cpp/zygisk/main.cpp
@@ -20,8 +20,9 @@ public:
     }
 
     void preAppSpecialize(AppSpecializeArgs *args) override {
-        int enabled = 0;
         api_->setOption(zygisk::DLCLOSE_MODULE_LIBRARY);
+
+        int enabled = 0;
         {
             auto fd = api_->connectCompanion();
             if (fd >= 0) {
@@ -30,9 +31,19 @@ public:
             }
         }
         if (!enabled) return;
-        const char *process = env_->GetStringUTFChars(args->nice_name, nullptr);
-        if (process == "com.google.android.gms.unstable"sv) {
-            LOGI("spoofing build vars in %s!", process);
+        if (args->app_data_dir == nullptr) {
+            return;
+        }
+
+        auto app_data_dir = env_->GetStringUTFChars(args->app_data_dir, nullptr);
+        auto nice_name = env_->GetStringUTFChars(args->nice_name, nullptr);
+
+        std::string_view process(nice_name);
+        std::string_view dir(app_data_dir);
+
+        if (dir.ends_with("/com.google.android.gms") &&
+            process == "com.google.android.gms.unstable") {
+            LOGI("spoofing build vars in GMS!");
             auto buildClass = env_->FindClass("android/os/Build");
             auto buildVersionClass = env_->FindClass("android/os/Build$VERSION");
 
@@ -43,7 +54,7 @@ public:
             SET_FIELD(buildClass, "MANUFACTURER", "Google");
             SET_FIELD(buildClass, "MODEL", "Pixel");
             SET_FIELD(buildClass, "FINGERPRINT",
-                            "google/sailfish/sailfish:8.1.0/OPM1.171019.011/4448085:user/release-keys");
+                      "google/sailfish/sailfish:8.1.0/OPM1.171019.011/4448085:user/release-keys");
             SET_FIELD(buildClass, "BRAND", "google");
             SET_FIELD(buildClass, "PRODUCT", "sailfish");
             SET_FIELD(buildClass, "DEVICE", "sailfish");
@@ -54,7 +65,9 @@ public:
             SET_FIELD(buildClass, "TYPE", "user");
             SET_FIELD(buildClass, "TAGS", "release-keys");
         }
-        env_->ReleaseStringUTFChars(args->nice_name, process);
+
+        env_->ReleaseStringUTFChars(args->nice_name, nice_name);
+        env_->ReleaseStringUTFChars(args->app_data_dir, app_data_dir);
     }
 
     void preServerSpecialize(ServerSpecializeArgs *args) override {