diff --git a/.ci_support/linux_64_mpi_typeconda.yaml b/.ci_support/linux_64_mpi_typeconda.yaml
index 20d9c95..473399f 100644
--- a/.ci_support/linux_64_mpi_typeconda.yaml
+++ b/.ci_support/linux_64_mpi_typeconda.yaml
@@ -1,7 +1,7 @@
 c_compiler:
 - gcc
 c_compiler_version:
-- '12'
+- '13'
 c_stdlib:
 - sysroot
 c_stdlib_version:
@@ -15,13 +15,13 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 mpi_type:
 - conda
 target_platform:
diff --git a/.ci_support/linux_64_mpi_typeexternal.yaml b/.ci_support/linux_64_mpi_typeexternal.yaml
index 4e650b3..d626a29 100644
--- a/.ci_support/linux_64_mpi_typeexternal.yaml
+++ b/.ci_support/linux_64_mpi_typeexternal.yaml
@@ -1,7 +1,7 @@
 c_compiler:
 - gcc
 c_compiler_version:
-- '12'
+- '13'
 c_stdlib:
 - sysroot
 c_stdlib_version:
@@ -15,13 +15,13 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 mpi_type:
 - external
 target_platform:
diff --git a/.ci_support/linux_aarch64_mpi_typeconda.yaml b/.ci_support/linux_aarch64_mpi_typeconda.yaml
index 6d0b5fa..9f56e8e 100644
--- a/.ci_support/linux_aarch64_mpi_typeconda.yaml
+++ b/.ci_support/linux_aarch64_mpi_typeconda.yaml
@@ -3,7 +3,7 @@ BUILD:
 c_compiler:
 - gcc
 c_compiler_version:
-- '12'
+- '13'
 c_stdlib:
 - sysroot
 c_stdlib_version:
@@ -19,13 +19,13 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 mpi_type:
 - conda
 target_platform:
diff --git a/.ci_support/linux_aarch64_mpi_typeexternal.yaml b/.ci_support/linux_aarch64_mpi_typeexternal.yaml
index c2ead7e..8ef2580 100644
--- a/.ci_support/linux_aarch64_mpi_typeexternal.yaml
+++ b/.ci_support/linux_aarch64_mpi_typeexternal.yaml
@@ -3,7 +3,7 @@ BUILD:
 c_compiler:
 - gcc
 c_compiler_version:
-- '12'
+- '13'
 c_stdlib:
 - sysroot
 c_stdlib_version:
@@ -19,13 +19,13 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 mpi_type:
 - external
 target_platform:
diff --git a/.ci_support/linux_ppc64le_mpi_typeconda.yaml b/.ci_support/linux_ppc64le_mpi_typeconda.yaml
index 35f41fc..04fc5dc 100644
--- a/.ci_support/linux_ppc64le_mpi_typeconda.yaml
+++ b/.ci_support/linux_ppc64le_mpi_typeconda.yaml
@@ -1,7 +1,7 @@
 c_compiler:
 - gcc
 c_compiler_version:
-- '12'
+- '13'
 c_stdlib:
 - sysroot
 c_stdlib_version:
@@ -15,13 +15,13 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 mpi_type:
 - conda
 target_platform:
diff --git a/.ci_support/linux_ppc64le_mpi_typeexternal.yaml b/.ci_support/linux_ppc64le_mpi_typeexternal.yaml
index af858f6..daf8ca3 100644
--- a/.ci_support/linux_ppc64le_mpi_typeexternal.yaml
+++ b/.ci_support/linux_ppc64le_mpi_typeexternal.yaml
@@ -1,7 +1,7 @@
 c_compiler:
 - gcc
 c_compiler_version:
-- '12'
+- '13'
 c_stdlib:
 - sysroot
 c_stdlib_version:
@@ -15,13 +15,13 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 mpi_type:
 - external
 target_platform:
diff --git a/.ci_support/osx_64_mpi_typeconda.yaml b/.ci_support/osx_64_mpi_typeconda.yaml
index 0b2c46d..ca2512a 100644
--- a/.ci_support/osx_64_mpi_typeconda.yaml
+++ b/.ci_support/osx_64_mpi_typeconda.yaml
@@ -5,7 +5,7 @@ MACOSX_SDK_VERSION:
 c_compiler:
 - clang
 c_compiler_version:
-- '16'
+- '17'
 c_stdlib:
 - macosx_deployment_target
 c_stdlib_version:
@@ -17,11 +17,11 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 macos_machine:
 - x86_64-apple-darwin13.4.0
 mpi_type:
diff --git a/.ci_support/osx_64_mpi_typeexternal.yaml b/.ci_support/osx_64_mpi_typeexternal.yaml
index f101bf7..5a40c50 100644
--- a/.ci_support/osx_64_mpi_typeexternal.yaml
+++ b/.ci_support/osx_64_mpi_typeexternal.yaml
@@ -5,7 +5,7 @@ MACOSX_SDK_VERSION:
 c_compiler:
 - clang
 c_compiler_version:
-- '16'
+- '17'
 c_stdlib:
 - macosx_deployment_target
 c_stdlib_version:
@@ -17,11 +17,11 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 macos_machine:
 - x86_64-apple-darwin13.4.0
 mpi_type:
diff --git a/.ci_support/osx_arm64_mpi_typeconda.yaml b/.ci_support/osx_arm64_mpi_typeconda.yaml
index 3763f46..5eb3f58 100644
--- a/.ci_support/osx_arm64_mpi_typeconda.yaml
+++ b/.ci_support/osx_arm64_mpi_typeconda.yaml
@@ -5,7 +5,7 @@ MACOSX_SDK_VERSION:
 c_compiler:
 - clang
 c_compiler_version:
-- '16'
+- '17'
 c_stdlib:
 - macosx_deployment_target
 c_stdlib_version:
@@ -17,11 +17,11 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 macos_machine:
 - arm64-apple-darwin20.0.0
 mpi_type:
diff --git a/.ci_support/osx_arm64_mpi_typeexternal.yaml b/.ci_support/osx_arm64_mpi_typeexternal.yaml
index 9b468e6..a4d4508 100644
--- a/.ci_support/osx_arm64_mpi_typeexternal.yaml
+++ b/.ci_support/osx_arm64_mpi_typeexternal.yaml
@@ -5,7 +5,7 @@ MACOSX_SDK_VERSION:
 c_compiler:
 - clang
 c_compiler_version:
-- '16'
+- '17'
 c_stdlib:
 - macosx_deployment_target
 c_stdlib_version:
@@ -17,11 +17,11 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 fortran_compiler:
 - gfortran
 fortran_compiler_version:
-- '12'
+- '13'
 macos_machine:
 - arm64-apple-darwin20.0.0
 mpi_type:
diff --git a/.scripts/build_steps.sh b/.scripts/build_steps.sh
index ba4b251..856f469 100755
--- a/.scripts/build_steps.sh
+++ b/.scripts/build_steps.sh
@@ -43,6 +43,8 @@ setup_conda_rc "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
 
 source run_conda_forge_build_setup
 
+
+
 # make the build number clobber
 make_build_number "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
 
diff --git a/.scripts/run_osx_build.sh b/.scripts/run_osx_build.sh
index ba0c879..420f051 100755
--- a/.scripts/run_osx_build.sh
+++ b/.scripts/run_osx_build.sh
@@ -11,7 +11,7 @@ MINIFORGE_HOME=${MINIFORGE_HOME:-${HOME}/miniforge3}
 ( startgroup "Installing a fresh version of Miniforge" ) 2> /dev/null
 
 MINIFORGE_URL="https://github.com/conda-forge/miniforge/releases/latest/download"
-MINIFORGE_FILE="Mambaforge-MacOSX-$(uname -m).sh"
+MINIFORGE_FILE="Miniforge3-MacOSX-$(uname -m).sh"
 curl -L -O "${MINIFORGE_URL}/${MINIFORGE_FILE}"
 rm -rf ${MINIFORGE_HOME}
 bash $MINIFORGE_FILE -b -p ${MINIFORGE_HOME}
diff --git a/build-locally.py b/build-locally.py
index e0d408d..6788aea 100755
--- a/build-locally.py
+++ b/build-locally.py
@@ -1,13 +1,16 @@
-#!/usr/bin/env python3
+#!/bin/sh
+"""exec" "python3" "$0" "$@" #"""  # fmt: off # fmt: on
 #
 # This file has been generated by conda-smithy in order to build the recipe
 # locally.
 #
-import os
+# The line above this comment is a bash / sh / zsh guard
+# to stop people from running it with the wrong interpreter
 import glob
+import os
+import platform
 import subprocess
 from argparse import ArgumentParser
-import platform
 
 
 def setup_environment(ns):
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 8de02f0..2c2bc5d 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -66,10 +66,7 @@ outputs:
   - name: mpich-mpicc
     build:
       script:
-        - echo 'ok'  # [not osx]
-        # make CONDA_BUILD_SYSROOT a 'used variable'
-        # so that conda-build knows to pass it to the test env
-        - echo "{{ CONDA_BUILD_SYSROOT }}"  # [osx]
+        - echo 'ok'
     requirements:
       run:
         - {{ pin_subpackage('mpich', exact=True) }}
@@ -84,10 +81,7 @@ outputs:
   - name: mpich-mpicxx
     build:
       script:
-        - echo 'ok'  # [not osx]
-        # make CONDA_BUILD_SYSROOT a 'used variable'
-        # so that conda-build knows to pass it to the test env
-        - echo "{{ CONDA_BUILD_SYSROOT }}"  # [osx]
+        - echo 'ok'
     requirements:
       run:
         - {{ pin_subpackage('mpich', exact=True) }}
@@ -102,10 +96,7 @@ outputs:
   - name: mpich-mpifort
     build:
       script:
-        - echo 'ok'  # [not osx]
-        # make CONDA_BUILD_SYSROOT a 'used variable'
-        # so that conda-build knows to pass it to the test env
-        - echo "{{ CONDA_BUILD_SYSROOT }}"  # [osx]
+        - echo 'ok'
     requirements:
       run:
         - {{ pin_subpackage('mpich', exact=True) }}