Index: src/CMakeLists.txt
--- src/CMakeLists.txt.orig
+++ src/CMakeLists.txt
@@ -167,6 +167,8 @@ if (SLIC3R_GUI)
         target_link_libraries(PrusaSlicer PRIVATE ws2_32 uxtheme setupapi)
     elseif (APPLE)
         target_link_libraries(PrusaSlicer PRIVATE "-framework OpenGL")
+    elseif (CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
+        # no-op
     else ()
         target_link_libraries(PrusaSlicer PRIVATE -ldl)
     endif ()
