diff --git a/CMakeLists.txt b/CMakeLists.txt
index c77c077eee..edfe163cb5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@ option(SLIC3R_MSVC_PDB          "Generate PDB files on MSVC in Release mode" 1)
 option(SLIC3R_PERL_XS           "Compile XS Perl module and enable Perl unit and integration tests" 0)
 option(SLIC3R_ASAN              "Enable ASan on Clang and GCC" 0)
 option(SLIC3R_UBSAN             "Enable UBSan on Clang and GCC" 0)
-option(SLIC3R_ENABLE_FORMAT_STEP "Enable compilation of STEP file support" 1)
+option(SLIC3R_ENABLE_FORMAT_STEP "Enable compilation of STEP file support" OFF)
 # If SLIC3R_FHS is 1 -> SLIC3R_DESKTOP_INTEGRATION is always 0, othrewise variable.
 CMAKE_DEPENDENT_OPTION(SLIC3R_DESKTOP_INTEGRATION "Allow perfoming desktop integration during runtime" 1 "NOT SLIC3R_FHS" 0)
 
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 8f426e5bbc..ce49cbfc42 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -136,7 +136,7 @@ set(REQUIRED_PACKAGES
     wxWidgets
     OpenVDB
     CGAL
-    OCCT
+    # OCCT
     ZLIB
 )