diff --git a/srcpkgs/PrusaSlicer/patches/prusa-slicer-openexr3.patch b/srcpkgs/PrusaSlicer/patches/prusa-slicer-openexr3.patch
new file mode 100644
index 00000000000..9caf47f640c
--- /dev/null
+++ b/srcpkgs/PrusaSlicer/patches/prusa-slicer-openexr3.patch
@@ -0,0 +1,76 @@
+diff -up PrusaSlicer-version_2.4.0/cmake/modules/FindOpenVDB.cmake.openexr3 PrusaSlicer-version_2.4.0/cmake/modules/FindOpenVDB.cmake
+--- PrusaSlicer-version_2.4.0/cmake/modules/FindOpenVDB.cmake.openexr3	2021-12-21 15:57:35.000000000 +0000
++++ PrusaSlicer-version_2.4.0/cmake/modules/FindOpenVDB.cmake	2022-02-11 19:27:12.105404186 +0000
+@@ -347,28 +347,10 @@ macro(just_fail msg)
+   return()
+ endmacro()
+ 
+-find_package(IlmBase QUIET)
+-if(NOT IlmBase_FOUND)
+-  pkg_check_modules(IlmBase QUIET IlmBase)
+-endif()
+-if (IlmBase_FOUND AND NOT TARGET IlmBase::Half)
+-  message(STATUS "Falling back to IlmBase found by pkg-config...")
+-
+-  find_library(IlmHalf_LIBRARY NAMES Half)
+-  if(IlmHalf_LIBRARY-NOTFOUND OR NOT IlmBase_INCLUDE_DIRS)
+-    just_fail("IlmBase::Half can not be found!")
+-  endif()
+-  
+-  add_library(IlmBase::Half UNKNOWN IMPORTED)
+-  set_target_properties(IlmBase::Half PROPERTIES
+-    IMPORTED_LOCATION "${IlmHalf_LIBRARY}"
+-    INTERFACE_INCLUDE_DIRECTORIES "${IlmBase_INCLUDE_DIRS}")
+-elseif(NOT IlmBase_FOUND)
+-  just_fail("IlmBase::Half can not be found!")
+-endif()
+ find_package(TBB ${_quiet} ${_required} COMPONENTS tbb)
+ find_package(ZLIB ${_quiet} ${_required})
+ find_package(Boost ${_quiet} ${_required} COMPONENTS iostreams system )
++find_package(Imath CONFIG)
+ 
+ # Use GetPrerequisites to see which libraries this OpenVDB lib has linked to
+ # which we can query for optional deps. This basically runs ldd/otoll/objdump
+@@ -419,7 +401,7 @@ foreach(PREREQUISITE ${_OPENVDB_PREREQUI
+     set(OpenVDB_USES_LOG4CPLUS ON)
+   endif()
+ 
+-  string(FIND ${PREREQUISITE} "IlmImf" _HAS_DEP)
++  string(FIND ${PREREQUISITE} "OpenEXR" _HAS_DEP)
+   if(NOT ${_HAS_DEP} EQUAL -1)
+     set(OpenVDB_USES_ILM ON)
+   endif()
+@@ -450,11 +432,7 @@ if(OpenVDB_USES_LOG4CPLUS)
+   find_package(Log4cplus ${_quiet} ${_required})
+ endif()
+ 
+-if(OpenVDB_USES_ILM)
+-  find_package(IlmBase ${_quiet} ${_required})
+-endif()
+-
+-if(OpenVDB_USES_EXR)
++if(OpenVDB_USES_ILM OR OpenVDB_USES_EXR)
+   find_package(OpenEXR ${_quiet} ${_required})
+ endif()
+ 
+@@ -471,7 +449,7 @@ endif()
+ set(_OPENVDB_VISIBLE_DEPENDENCIES
+   Boost::iostreams
+   Boost::system
+-  IlmBase::Half
++  Imath::Imath
+ )
+ 
+ set(_OPENVDB_DEFINITIONS)
+@@ -481,10 +459,7 @@ endif()
+ 
+ if(OpenVDB_USES_EXR)
+   list(APPEND _OPENVDB_VISIBLE_DEPENDENCIES
+-    IlmBase::IlmThread
+-    IlmBase::Iex
+-    IlmBase::Imath
+-    OpenEXR::IlmImf
++    OpenEXR::OpenEXR
+   )
+   list(APPEND _OPENVDB_DEFINITIONS "-DOPENVDB_TOOLS_RAYTRACER_USE_EXR")
+ endif()
diff --git a/srcpkgs/PrusaSlicer/patches/system-boost-nowide.nop b/srcpkgs/PrusaSlicer/patches/system-boost-nowide.nop
deleted file mode 100644
index a396684dc0e..00000000000
--- a/srcpkgs/PrusaSlicer/patches/system-boost-nowide.nop
+++ /dev/null
@@ -1,229 +0,0 @@
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -326,7 +326,7 @@ endif()
- # boost::process was introduced first in version 1.64.0,
- # boost::beast::detail::base64 was introduced first in version 1.66.0
- set(MINIMUM_BOOST_VERSION "1.66.0")
--set(_boost_components "system;filesystem;thread;log;locale;regex;chrono;atomic;date_time;iostreams")
-+set(_boost_components "system;filesystem;thread;log;locale;regex;chrono;atomic;date_time;iostreams;nowide")
- find_package(Boost ${MINIMUM_BOOST_VERSION} REQUIRED COMPONENTS ${_boost_components})
- 
- add_library(boost_libs INTERFACE)
---- a/src/CMakeLists.txt
-+++ b/src/CMakeLists.txt
-@@ -4,8 +4,6 @@ project(PrusaSlicer-native)
- add_subdirectory(build-utils)
- add_subdirectory(admesh)
- add_subdirectory(avrdude)
--# boost/nowide
--add_subdirectory(boost)
- add_subdirectory(clipper)
- add_subdirectory(miniz)
- add_subdirectory(glu-libtess)
---- a/src/libslic3r/CMakeLists.txt
-+++ b/src/libslic3r/CMakeLists.txt
-@@ -341,7 +341,6 @@ target_link_libraries(libslic3r
-     miniz
-     boost_libs
-     clipper
--    nowide
-     ${EXPAT_LIBRARIES}
-     glu-libtess
-     qhull
---- a/src/PrusaSlicer.cpp
-+++ b/src/PrusaSlicer.cpp
-@@ -25,9 +25,9 @@
- #include <boost/algorithm/string/predicate.hpp>
- #include <boost/filesystem.hpp>
- #include <boost/nowide/args.hpp>
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/iostream.hpp>
--#include <boost/nowide/integration/filesystem.hpp>
-+#include <boost/nowide/filesystem.hpp>
- #include <boost/dll/runtime_symbol_info.hpp>
- 
- #include "unix/fhs.hpp"  // Generated by CMake from ../platform/unix/fhs.hpp.in
---- a/src/libslic3r/pchheader.hpp
-+++ b/src/libslic3r/pchheader.hpp
-@@ -81,12 +81,12 @@
- #include <boost/log/expressions.hpp>
- #include <boost/log/trivial.hpp>
- #include <boost/multi_array.hpp>
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/convert.hpp>
- #include <boost/nowide/cstdio.hpp>
- #include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/fstream.hpp>
--#include <boost/nowide/integration/filesystem.hpp>
-+#include <boost/nowide/filesystem.hpp>
- #include <boost/nowide/iostream.hpp>
- 
- // boost/property_tree/json_parser/detail/parser.hpp includes boost/bind.hpp, which is deprecated.
---- a/src/libslic3r/AppConfig.cpp
-+++ b/src/libslic3r/AppConfig.cpp
-@@ -12,7 +12,7 @@
- 
- #include <boost/filesystem/path.hpp>
- #include <boost/filesystem/operations.hpp>
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/fstream.hpp>
- #include <boost/property_tree/ini_parser.hpp>
- #include <boost/property_tree/ptree_fwd.hpp>
---- a/src/libslic3r/Config.cpp
-+++ b/src/libslic3r/Config.cpp
-@@ -16,7 +16,7 @@
- #include <boost/config.hpp>
- #include <boost/foreach.hpp>
- #include <boost/lexical_cast.hpp>
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/iostream.hpp>
- #include <boost/nowide/fstream.hpp>
- #include <boost/property_tree/ini_parser.hpp>
---- a/src/libslic3r/GCode/PostProcessor.cpp
-+++ b/src/libslic3r/GCode/PostProcessor.cpp
-@@ -9,7 +9,7 @@
- #include <boost/format.hpp>
- #include <boost/filesystem.hpp>
- #include <boost/nowide/convert.hpp>
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/fstream.hpp>
- 
- #ifdef WIN32
---- a/src/libslic3r/Preset.cpp
-+++ b/src/libslic3r/Preset.cpp
-@@ -30,7 +30,7 @@
- #include <boost/algorithm/string.hpp>
- #include <boost/algorithm/string/predicate.hpp>
- 
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/convert.hpp>
- #include <boost/nowide/cstdio.hpp>
- #include <boost/nowide/fstream.hpp>
---- a/src/libslic3r/PresetBundle.cpp
-+++ b/src/libslic3r/PresetBundle.cpp
-@@ -14,7 +14,7 @@
- #include <boost/algorithm/clamp.hpp>
- #include <boost/algorithm/string/predicate.hpp>
- 
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/cstdio.hpp>
- #include <boost/nowide/fstream.hpp>
- #include <boost/property_tree/ini_parser.hpp>
---- a/src/slic3r/pchheader.hpp
-+++ b/src/slic3r/pchheader.hpp
-@@ -73,7 +73,7 @@
- #include <boost/locale.hpp>
- #include <boost/locale/encoding_utf.hpp>
- #include <boost/log/trivial.hpp>
--#include <boost/nowide/cenv.hpp>
-+#include <boost/nowide/cstdlib.hpp>
- #include <boost/nowide/convert.hpp>
- #include <boost/nowide/cstdio.hpp>
- #include <boost/nowide/fstream.hpp>
---- a/src/slic3r/GUI/Plater.cpp
-+++ b/src/slic3r/GUI/Plater.cpp
-@@ -1339,7 +1339,7 @@ void Sidebar::update_sliced_info_sizer()
-             wxString t_est = std::isnan(ps.estimated_print_time) ? "N/A" : get_time_dhms(float(ps.estimated_print_time));
-             p->sliced_info->SetTextAndShow(siEstimatedTime, t_est, _L("Estimated printing time") + ":");
- 
--            p->plater->get_notification_manager()->set_slicing_complete_print_time(_utf8("Estimated printing time: ") + boost::nowide::narrow(t_est), p->plater->is_sidebar_collapsed());
-+            p->plater->get_notification_manager()->set_slicing_complete_print_time(static_cast<const char*>((_utf8("Estimated printing time: ") + t_est.utf8_str()).utf8_str()), p->plater->is_sidebar_collapsed());
- 
-             // Hide non-SLA sliced info parameters
-             p->sliced_info->SetTextAndShow(siFilament_m, "N/A");
---- a/src/slic3r/GUI/GUI_ObjectList.cpp
-+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
-@@ -4153,7 +4153,7 @@ void ObjectList::fix_through_netfabb()
-     }
-     if (msg.IsEmpty())
-         msg = _L("Repairing was canceled");
--    plater->get_notification_manager()->push_notification(NotificationType::NetfabbFinished, NotificationManager::NotificationLevel::PrintInfoShortNotificationLevel, boost::nowide::narrow(msg));
-+    plater->get_notification_manager()->push_notification(NotificationType::NetfabbFinished, NotificationManager::NotificationLevel::PrintInfoShortNotificationLevel, static_cast<const char *>(msg.utf8_str()));
- }
- 
- void ObjectList::simplify()
---- a/src/slic3r/GUI/PrintHostDialogs.cpp
-+++ b/src/slic3r/GUI/PrintHostDialogs.cpp
-@@ -411,7 +411,7 @@ void PrintHostQueueDialog::on_progress(E
-         wxVariant nm, hst;
-         job_list->GetValue(nm, evt.job_id, COL_FILENAME);
-         job_list->GetValue(hst, evt.job_id, COL_HOST);
--        wxGetApp().notification_manager()->set_upload_job_notification_percentage(evt.job_id + 1, boost::nowide::narrow(nm.GetString()), boost::nowide::narrow(hst.GetString()), evt.progress / 100.f);
-+        wxGetApp().notification_manager()->set_upload_job_notification_percentage(evt.job_id + 1, nm.GetString().ToStdString(), hst.GetString().ToStdString(), evt.progress / 100.f);
-     }
- }
- 
-@@ -432,7 +432,7 @@ void PrintHostQueueDialog::on_error(Even
-     wxVariant nm, hst;
-     job_list->GetValue(nm, evt.job_id, COL_FILENAME);
-     job_list->GetValue(hst, evt.job_id, COL_HOST);
--    wxGetApp().notification_manager()->upload_job_notification_show_error(evt.job_id + 1, boost::nowide::narrow(nm.GetString()), boost::nowide::narrow(hst.GetString()));
-+    wxGetApp().notification_manager()->upload_job_notification_show_error(evt.job_id + 1, nm.GetString().ToStdString(), hst.GetString().ToStdString());
- }
- 
- void PrintHostQueueDialog::on_cancel(Event &evt)
-@@ -447,7 +447,7 @@ void PrintHostQueueDialog::on_cancel(Eve
-     wxVariant nm, hst;
-     job_list->GetValue(nm, evt.job_id, COL_FILENAME);
-     job_list->GetValue(hst, evt.job_id, COL_HOST);
--    wxGetApp().notification_manager()->upload_job_notification_show_canceled(evt.job_id + 1, boost::nowide::narrow(nm.GetString()), boost::nowide::narrow(hst.GetString()));
-+    wxGetApp().notification_manager()->upload_job_notification_show_canceled(evt.job_id + 1, nm.GetString().ToStdString(), hst.GetString().ToStdString());
- }
- 
- void PrintHostQueueDialog::get_active_jobs(std::vector<std::pair<std::string, std::string>>& ret)
---- a/src/slic3r/GUI/Search.cpp
-+++ b/src/slic3r/GUI/Search.cpp
-@@ -239,7 +239,7 @@ bool OptionsSearcher::search(const std::
-         const Option &opt = options[i];
-         if (full_list) {
-             std::string label = into_u8(get_label(opt));
--            found.emplace_back(FoundOption{ label, label, boost::nowide::narrow(get_tooltip(opt)), i, 0 });
-+            found.emplace_back(FoundOption{ label, label, get_tooltip(opt).ToStdString(), i, 0 });
-             continue;
-         }
- 
-@@ -276,7 +276,7 @@ bool OptionsSearcher::search(const std::
-             boost::erase_all(label_plain, std::string(1, char(ImGui::ColorMarkerStart)));
-             boost::erase_all(label_plain, std::string(1, char(ImGui::ColorMarkerEnd)));
- #endif
--	        found.emplace_back(FoundOption{ label_plain, label_u8, boost::nowide::narrow(get_tooltip(opt)), i, score });
-+	        found.emplace_back(FoundOption{ label_plain, label_u8, get_tooltip(opt).ToStdString(), i, score });
-         }
-     }
- 
---- a/src/slic3r/GUI/DesktopIntegrationDialog.cpp
-+++ b/src/slic3r/GUI/DesktopIntegrationDialog.cpp
-@@ -118,7 +118,7 @@ void resolve_path_from_var(const std::st
-     wxString wxdirs;
-     if (! wxGetEnv(boost::nowide::widen(var), &wxdirs) || wxdirs.empty() )
-         return;
--    std::string dirs = boost::nowide::narrow(wxdirs);
-+    std::string dirs = wxdirs.ToStdString();
-     for (size_t i = dirs.find(':'); i != std::string::npos; i = dirs.find(':'))
-     {
-         paths.push_back(dirs.substr(0, i));
-@@ -303,7 +303,7 @@ void DesktopIntegrationDialog::perform_d
-             // if all failed - try creating default home folder
-             if (i == target_candidates.size() - 1) {
-                 // create $HOME/.local/share
--                create_path(boost::nowide::narrow(wxFileName::GetHomeDir()), ".local/share/icons" + icon_theme_dirs);
-+                create_path(wxFileName::GetHomeDir().ToStdString(), ".local/share/icons" + icon_theme_dirs);
-                 // copy icon
-                 target_dir_icons = GUI::format("%1%/.local/share",wxFileName::GetHomeDir());
-                 std::string icon_path = GUI::format("%1%/icons/PrusaSlicer.png",resources_dir());
-@@ -355,7 +355,7 @@ void DesktopIntegrationDialog::perform_d
-             // if all failed - try creating default home folder
-             if (i == target_candidates.size() - 1) {
-                 // create $HOME/.local/share
--                create_path(boost::nowide::narrow(wxFileName::GetHomeDir()), ".local/share/applications");
-+                create_path(wxFileName::GetHomeDir().ToStdString(), ".local/share/applications");
-                 // create desktop file
-                 target_dir_desktop = GUI::format("%1%/.local/share",wxFileName::GetHomeDir());
-                 std::string path = GUI::format("%1%/applications/PrusaSlicer%2%.desktop", target_dir_desktop, version_suffix);
diff --git a/srcpkgs/PrusaSlicer/template b/srcpkgs/PrusaSlicer/template
index 25e9738dabd..676680fb429 100644
--- a/srcpkgs/PrusaSlicer/template
+++ b/srcpkgs/PrusaSlicer/template
@@ -1,7 +1,7 @@
 # Template file for 'PrusaSlicer'
 pkgname=PrusaSlicer
 version=2.4.2
-revision=3
+revision=4
 build_style=cmake
 build_helper="qemu cmake-wxWidgets-gtk3"
 # Pre-Compiled Headers seems to be slower
@@ -11,7 +11,7 @@ hostmakedepends="pkg-config"
 makedepends=" boost-devel cereal cgal-devel dbus-devel eigen glew-devel
  glu-devel gmpxx-devel gtest-devel gtk+3-devel libcurl-devel libglib-devel
  libpng-devel nlopt-devel openvdb-devel tbb-devel wxWidgets-devel mpfr-devel
- c-blosc-devel ilmbase-devel libopenexr-devel wxWidgets-gtk3-devel"
+ c-blosc-devel imath-devel libopenexr-devel wxWidgets-gtk3-devel"
 short_desc="G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)"
 maintainer="Jasper Chan <jasperchan515@gmail.com>"
 license="GPL-3.0-or-later"