diff --git a/nix/build-all.py b/nix/build-all.py
index ec600358ce..9e340b2388 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -378,7 +378,9 @@ if TARGET_ARCH == "i686" and __check_output__([uname, "-m"]).strip() == "x86_64"
     BOOST_ADDRESS_MODEL=["architecture=x86", "address-model=32"]
 
 if get_os() == "Darwin":
-    ADDITIONAL_ARGS=["-mmacosx-version-min=10.6"]+ADDITIONAL_ARGS
+    # C++11 features used in OCCT 7+ need a more recent stdlib
+    version_min = "10.9" if USE_OCCT else "10.6"
+    ADDITIONAL_ARGS=["-mmacosx-version-min=" % version_min]+ADDITIONAL_ARGS
 
 # If the linker supports GC sections, set it up to reduce binary file size
 # -fPIC is required for the shared libraries to work