diff --git a/pkgs/development/python-modules/dissect-cstruct/default.nix b/pkgs/development/python-modules/dissect-cstruct/default.nix
index 32e30dbad6a2..bcc86b1f7588 100644
--- a/pkgs/development/python-modules/dissect-cstruct/default.nix
+++ b/pkgs/development/python-modules/dissect-cstruct/default.nix
@@ -10,9 +10,9 @@
 buildPythonPackage rec {
   pname = "dissect-cstruct";
   version = "3.12";
-  format = "pyproject";
+  pyproject = true;
 
-  disabled = pythonOlder "3.12";
+  disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "fox-it";
diff --git a/pkgs/development/python-modules/dissect-target/default.nix b/pkgs/development/python-modules/dissect-target/default.nix
index 5248aa20de68..786b29562874 100644
--- a/pkgs/development/python-modules/dissect-target/default.nix
+++ b/pkgs/development/python-modules/dissect-target/default.nix
@@ -53,7 +53,7 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace pyproject.toml \
-      --replace "flow.record~=" "flow.record>="
+      --replace-warn "flow.record~=" "flow.record>="
   '';
 
   nativeBuildInputs = [
@@ -110,12 +110,13 @@ buildPythonPackage rec {
     # Test requires rdump
     "test_exec_target_command"
     # Issue with tar file
-    "test_tar_sensitive_drive_letter"
     "test_dpapi_decrypt_blob"
-    "test_notifications_appdb"
     "test_md"
-    "test_notifications_wpndatabase"
     "test_nested_md_lvm"
+    "test_notifications_appdb"
+    "test_notifications_wpndatabase"
+    "test_tar_anonymous_filesystems"
+    "test_tar_sensitive_drive_letter"
     # Tests compare dates and times
     "yum"
     # Filesystem access, windows defender tests