diff --git a/conda/meta.yaml b/conda/meta.yaml
index 9559d04..b3d8e01 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -17,15 +17,11 @@ build:
   number: 2
 
 requirements:
-  # run_constrained:                                            # [osx]
-  #  - __osx >={{ MACOSX_DEPLOYMENT_TARGET|default("10.9") }}  # [osx]
+  # run_constrained:                                            # [osx and x86_64]
+    - __osx >={{ MACOSX_DEPLOYMENT_TARGET|default("10.14") }}  # [osx and x86_64]
   build:
-    - python
     - {{ compiler('cxx')}} 
     - make                               # [unix]
-    - sip
-    - pyqt5-sip
-    - pyqt-builder
     - pkg-config                         # [linux]
     - sysroot_linux-64 2.17              # [linux64]
     - binutils_impl_linux-64             # [linux]
@@ -35,9 +31,12 @@ requirements:
     - {{ cdt('libselinux') }}            # [linux]
     - {{ cdt('libxdamage') }}            # [linux]
     - {{ cdt('libxxf86vm') }}            # [linux]
-    - {{ cdt('libxfixes') }}            # [linux]
-    - {{ cdt('libxcb') }}               # [linux]
+    - {{ cdt('libxfixes') }}             # [linux]
+    - {{ cdt('libxcb') }}                # [linux]
     # from https://conda-forge.org/docs/maintainer/knowledge_base.html#libgl
+    - python                             # [build_platform != target_platform]
+    - sip                                # [build_platform != target_platform]
+    - pyqt-builder                       # [build_platform != target_platform]
   host:
     - python
     - pip