diff --git a/.github/workflows/publish_pypi.yml b/.github/workflows/publish_pypi.yml
index ccb45df..5de9ce5 100644
--- a/.github/workflows/publish_pypi.yml
+++ b/.github/workflows/publish_pypi.yml
@@ -199,5 +199,6 @@ jobs:
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           password: ${{ secrets.PYPI_API_TOKEN }}
+          skip-existing: true
         env:
           GITHUB_WORKFLOW_REF: 1.10.1
diff --git a/.gitmodules b/.gitmodules
index a425167..6fb5dd1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,6 +4,3 @@
 [submodule "image-registration"]
 	path = image-registration
 	url = https://git.pomppervova.nl/wim/image-registration.git
-[submodule "libczirw-sys"]
-	path = libczirw-sys
-	url = https://git.pomppervova.nl/wim/libczirw-sys.git
diff --git a/Cargo.toml b/Cargo.toml
index 860601d..c984541 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,22 +17,9 @@ categories = ["multimedia::images", "science"]
 
 [profile.test]
 inherits = "release"
-# Full debug info goes in the TEST profile only (readable cargo-test
-# backtraces). It must NOT be in the release profile: on ELF targets
-# (Linux/musl wheels) the DWARF gets embedded in the .so (~160 MB, over
-# PyPI's 100 MB limit) - MSVC puts it in a sidecar .pdb and the
-# apple/zig link path drops it, which is why only the Linux wheels were
-# bloated.
 debug = true
 
 [profile.release]
 
 [profile.dev.package.backtrace]
 opt-level = 3
-
-# Build against the libczirw-sys checkout in the submodule of that name:
-# its fixes (self-contained cmake build via vendored Eigen, msvc C runtime
-# alignment for xwin, bindgen flags for zig's libc++) are not yet published
-# to crates.io; drop this patch once a release containing them is available
-[patch.crates-io]
-libczirw-sys = { path = "libczirw-sys" }
diff --git a/libczirw-sys b/libczirw-sys
deleted file mode 160000
index 4d366d1..0000000
--- a/libczirw-sys
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 4d366d1272068bccbef9d559dc4165f2fa732c83
diff --git a/ndbioimage/Cargo.toml b/ndbioimage/Cargo.toml
index 892411e..26870b8 100644
--- a/ndbioimage/Cargo.toml
+++ b/ndbioimage/Cargo.toml
@@ -28,7 +28,7 @@ image-registration = { path = "../image-registration", version = "0.1", optional
 indexmap = { version = "2", features = ["serde"] }
 indicatif = { version = "0.18", features = ["rayon"], optional = true }
 j4rs = { version = "0.25", optional = true }
-libczirw-sys = { version = "0.5", optional = true }
+libczirw-sys = { version = "0.5.2", optional = true }
 ndarray = { version = "0.17", features = ["serde"] }
 num = "0.4"
 numpy = { version = "0.29", optional = true }