diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bfe1efc..fa61370f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -161,7 +161,7 @@ else()
   endif()
   set_property(TARGET ungz PROPERTY POSITION_INDEPENDENT_CODE ON)
   macro(support_gz exe)
-    target_sources(${exe} PUBLIC $<TARGET_OBJECTS:ungz>)
+    target_sources(${exe} PRIVATE $<TARGET_OBJECTS:ungz>)
   endmacro()
 endif()
 
@@ -473,5 +473,5 @@ if (USE_PYTHON)
   # Using Python_SITEARCH/SITELIB is not good, because they are absolute
   # and don't respect CMAKE_INSTALL_PREFIX.
   # https://discourse.cmake.org/t/findpython3-how-to-specify-local-installation-directory-for-python-module/3580/5
-  install(TARGETS gemmi_py DESTINATION "${Python_SITEARCH}")
+  install(TARGETS gemmi_py DESTINATION "${Python_SITEARCH}" COMPONENT py)
 endif()
diff --git a/pyproject.toml b/pyproject.toml
index cdfac965..a4697256 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,8 +64,6 @@ cmake.build-type = "Release"
 cmake.verbose = true
 [tool.scikit-build.cmake.define]
 USE_PYTHON = "ON"
-BUILD_GEMMI_PROGRAM = "OFF"
-INSTALL_DEV_FILES = "OFF"
 
 [tool.scikit-build.metadata.version]
 provider = "scikit_build_core.metadata.regex"
diff --git a/tools/gemmi-config.cmake.in b/tools/gemmi-config.cmake.in
index 7910e40e..3d36de4f 100644
--- a/tools/gemmi-config.cmake.in
+++ b/tools/gemmi-config.cmake.in
@@ -1,7 +1,7 @@
 @PACKAGE_INIT@
 
 include(CMakeFindDependencyMacro)
-find_dependency(ZLIB)
+find_package(ZLIB)
 
 include("${CMAKE_CURRENT_LIST_DIR}/gemmi-targets.cmake")