diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6e2cc92..ec1dff6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,10 @@ find_package(Ceres CONFIG)
 find_package(Eigen3 REQUIRED)
 find_package(FastFloat REQUIRED)
 find_package(Threads REQUIRED)
+find_package(byte-lite REQUIRED)
+find_package(span-lite REQUIRED)
 find_package(lbfgs REQUIRED)
+find_package(libassert REQUIRED)
 find_package(mdspan REQUIRED)
 find_package(operon REQUIRED)
 find_package(outcome REQUIRED)
diff --git a/environment.yml b/environment.yml
index 340bf9e..ee9218f 100644
--- a/environment.yml
+++ b/environment.yml
@@ -13,3 +13,6 @@ dependencies:
   - pybind11
   - scikit-build
   - xxhash
+  - zstd
+  - zstd-static
+  - zlib
diff --git a/script/dependencies.sh b/script/dependencies.sh
index 0975161..592dfdc 100755
--- a/script/dependencies.sh
+++ b/script/dependencies.sh
@@ -210,10 +210,56 @@ cmake --install build
 popd
 rm -rf mdspan
 
+# span-lite
+git clone https://github.com/martinmoene/span-lite.git
+pushd span-lite
+git checkout 50f55c59d1b66910837313c40d11328d03447a41
+mkdir build
+cmake -S . -B build -DCMAKE_INSTALL_PREFIX=${CONDA_PREFIX}
+cmake --install build
+popd
+rm -rf span-lite
+
+# byte-lite
+git clone https://github.com/martinmoene/byte-lite.git
+pushd byte-lite
+git checkout dd5b3827f7cd74c1f399d1ec2c063982d3442a99
+cmake -S . -B build -DCMAKE_INSTALL_PREFIX=${CONDA_PREFIX}
+cmake --install build
+popd
+rm -rf byte-lite
+
+# cpptrace
+git clone https://github.com/jeremy-rifkin/cpptrace.git
+pushd cpptrace
+cmake -S . -B build \
+       -DCMAKE_INSTALL_PREFIX=${CONDA_PREFIX} \
+       -DCPPTRACE_USE_EXTERNAL_ZSTD=1 \
+       -DCPPTRACE_GET_SYMBOLS_WITH_LIBDWARF=0
+cmake --build build
+cmake --install build
+popd
+rm -rf cpptrace
+
+# libassert
+git clone https://github.com/jeremy-rifkin/libassert.git
+pushd libassert
+git checkout v2.0.2
+mkdir build
+cmake -S . -B build \
+       -DCMAKE_BUILD_TYPE=Release \
+       -DLIBASSERT_USE_EXTERNAL_CPPTRACE=1 \
+       -DCMAKE_INSTALL_PREFIX=${CONDA_PREFIX}
+cmake --build build
+cmake --install build
+popd
+rm -rf libassert
+
 ## operon
+[ -d operon ] && rm -rf operon
 git clone https://github.com/heal-research/operon.git
 pushd operon
-git checkout d01b92cfa42e9e3059c1cbb4a8bc5cf5bacc8a96
+git checkout 4a93f98af108dbb98eb1cc10efe0f057b723293c
 mkdir build
 cmake -S . -B build --preset build-${PLATFORM} \
     -DCMAKE_BUILD_TYPE=Release \