diff --git a/install.ps1 b/install.ps1
index 49faa7a0..e0d59c89 100644
--- a/install.ps1
+++ b/install.ps1
@@ -8,7 +8,7 @@ param(
 
 $ErrorActionPreference = "Stop"
 $defaultInstallUrl = "https://raw.githubusercontent.com/Abdess/retrobios/main/install.py"
-$defaultInstallSha256 = "44492e7dea7639fec18b2b9c040606481b11dd7a91987e8b2548313fc82c902d"
+$defaultInstallSha256 = "d5f352fbe34cfd8ae40c0980c3986158ec1d9dd1babfe2bbc0918ffc0fa0bdf0"
 $maximumInstallerBytes = 2MB
 $installer = if ($PSScriptRoot) { Join-Path $PSScriptRoot "install.py" } else { $null }
 $temporary = $null
diff --git a/install.py b/install.py
index d346bc46..34cb7395 100644
--- a/install.py
+++ b/install.py
@@ -980,6 +980,24 @@ def _validate_manifest(data: object, plat: str) -> dict:
     for index, entry in enumerate(copies):
         if not isinstance(entry, dict):
             raise ValueError(f"standalone_copies[{index}] must be an object")
+        # The shape do_standalone_copies reads, checked here: a note with a
+        # list for detect, a copy naming neither file nor pattern, or a list
+        # for emulator passed and crashed the copy step after the download.
+        where = f"standalone_copies[{index}]"
+        if "note" in entry:
+            detect = entry.get("detect", {})
+            if not isinstance(entry["note"], str) or not isinstance(detect, dict):
+                raise ValueError(f"invalid note entry at {where}")
+            for values in detect.values():
+                if not isinstance(values, list) or not all(
+                    isinstance(value, str) for value in values
+                ):
+                    raise ValueError(f"invalid note entry at {where}")
+            continue
+        if "file" not in entry and "pattern" not in entry:
+            raise ValueError(f"{where} names neither a file nor a pattern")
+        if not isinstance(entry.get("emulator", ""), str):
+            raise ValueError(f"invalid emulator at {where}")
         if "file" in entry:
             _safe_relative_path(
                 entry["file"], f"standalone_copies[{index}].file"
diff --git a/install.sh b/install.sh
index 49747189..8f6d3608 100755
--- a/install.sh
+++ b/install.sh
@@ -18,7 +18,7 @@ esac
 TEMP_INSTALLER=""
 TEMP_DIRECTORY=""
 DEFAULT_INSTALL_URL="https://raw.githubusercontent.com/Abdess/retrobios/main/install.py"
-DEFAULT_INSTALL_SHA256="44492e7dea7639fec18b2b9c040606481b11dd7a91987e8b2548313fc82c902d"
+DEFAULT_INSTALL_SHA256="d5f352fbe34cfd8ae40c0980c3986158ec1d9dd1babfe2bbc0918ffc0fa0bdf0"
 MAX_INSTALLER_BYTES=2097152
 
 cleanup() {
diff --git a/tests/test_install.py b/tests/test_install.py
index d0a17b20..5219fae6 100644
--- a/tests/test_install.py
+++ b/tests/test_install.py
@@ -1138,6 +1138,19 @@ class TestStandaloneCopyTargetsAreUntrusted(unittest.TestCase):
         with self.assertRaises(ValueError):
             install._validate_manifest(manifest, "retroarch")
 
+    def test_entries_the_copy_step_cannot_read_are_refused(self):
+        """Each passed validation and crashed do_standalone_copies after the
+        download: a list for detect, no file nor pattern, a list for emulator."""
+        for entry in (
+            {"note": "hi", "detect": ["/x"]},
+            {"emulator": "pcsx2", "targets": {"linux": ["/tmp"]}},
+            {"file": "bios/x.bin", "emulator": ["a"], "targets": {"linux": ["/tmp"]}},
+        ):
+            manifest = {"manifest_version": 2, "platform": "retroarch", "files": [],
+                        "standalone_copies": [entry]}
+            with self.subTest(entry=entry), self.assertRaises(ValueError):
+                install._validate_manifest(manifest, "retroarch")
+
     def test_plain_absolute_target_still_works(self):
         manifest = {
             "manifest_version": 2,