diff --git a/.ci_support/linux_64_python3.10.yaml b/.ci_support/linux_64_python3.10.yaml
index aaee4b8..18fdeb5 100644
--- a/.ci_support/linux_64_python3.10.yaml
+++ b/.ci_support/linux_64_python3.10.yaml
@@ -1,5 +1,5 @@
 cdt_name:
-- cos6
+- cos7
 channel_sources:
 - gurobi,conda-forge,defaults
 channel_targets:
@@ -7,7 +7,7 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 pin_run_as_build:
diff --git a/.ci_support/linux_64_python3.11.yaml b/.ci_support/linux_64_python3.11.yaml
index 753f1cb..438381a 100644
--- a/.ci_support/linux_64_python3.11.yaml
+++ b/.ci_support/linux_64_python3.11.yaml
@@ -1,5 +1,5 @@
 cdt_name:
-- cos6
+- cos7
 channel_sources:
 - gurobi,conda-forge,defaults
 channel_targets:
@@ -7,7 +7,7 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 pin_run_as_build:
diff --git a/.ci_support/linux_64_python3.9.yaml b/.ci_support/linux_64_python3.9.yaml
index 3733d35..31c845f 100644
--- a/.ci_support/linux_64_python3.9.yaml
+++ b/.ci_support/linux_64_python3.9.yaml
@@ -1,5 +1,5 @@
 cdt_name:
-- cos6
+- cos7
 channel_sources:
 - gurobi,conda-forge,defaults
 channel_targets:
@@ -7,7 +7,7 @@ channel_targets:
 cxx_compiler:
 - gxx
 cxx_compiler_version:
-- '12'
+- '13'
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 pin_run_as_build:
diff --git a/.ci_support/osx_64_python3.10.yaml b/.ci_support/osx_64_python3.10.yaml
index a53c062..4617fee 100644
--- a/.ci_support/osx_64_python3.10.yaml
+++ b/.ci_support/osx_64_python3.10.yaml
@@ -9,7 +9,7 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 macos_machine:
 - x86_64-apple-darwin13.4.0
 pin_run_as_build:
diff --git a/.ci_support/osx_64_python3.11.yaml b/.ci_support/osx_64_python3.11.yaml
index 13c1f24..54dac37 100644
--- a/.ci_support/osx_64_python3.11.yaml
+++ b/.ci_support/osx_64_python3.11.yaml
@@ -9,7 +9,7 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 macos_machine:
 - x86_64-apple-darwin13.4.0
 pin_run_as_build:
diff --git a/.ci_support/osx_64_python3.12.yaml b/.ci_support/osx_64_python3.12.yaml
new file mode 100644
index 0000000..0adc326
--- /dev/null
+++ b/.ci_support/osx_64_python3.12.yaml
@@ -0,0 +1,22 @@
+MACOSX_DEPLOYMENT_TARGET:
+- '10.13'
+MACOSX_SDK_VERSION:
+- '10.13'
+channel_sources:
+- gurobi,conda-forge,defaults
+channel_targets:
+- funkelab main
+cxx_compiler:
+- clangxx
+cxx_compiler_version:
+- '17'
+macos_machine:
+- x86_64-apple-darwin13.4.0
+pin_run_as_build:
+  python:
+    min_pin: x.x
+    max_pin: x.x
+python:
+- '3.12'
+target_platform:
+- osx-64
diff --git a/.ci_support/osx_64_python3.9.yaml b/.ci_support/osx_64_python3.9.yaml
index 1fea55f..4124681 100644
--- a/.ci_support/osx_64_python3.9.yaml
+++ b/.ci_support/osx_64_python3.9.yaml
@@ -9,7 +9,7 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 macos_machine:
 - x86_64-apple-darwin13.4.0
 pin_run_as_build:
diff --git a/.ci_support/osx_arm64_python3.10.yaml b/.ci_support/osx_arm64_python3.10.yaml
index 8898b3d..6e90125 100644
--- a/.ci_support/osx_arm64_python3.10.yaml
+++ b/.ci_support/osx_arm64_python3.10.yaml
@@ -9,7 +9,7 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 macos_machine:
 - arm64-apple-darwin20.0.0
 pin_run_as_build:
diff --git a/.ci_support/osx_arm64_python3.11.yaml b/.ci_support/osx_arm64_python3.11.yaml
index 46d273b..589f8e1 100644
--- a/.ci_support/osx_arm64_python3.11.yaml
+++ b/.ci_support/osx_arm64_python3.11.yaml
@@ -9,7 +9,7 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 macos_machine:
 - arm64-apple-darwin20.0.0
 pin_run_as_build:
diff --git a/.ci_support/osx_arm64_python3.12.yaml b/.ci_support/osx_arm64_python3.12.yaml
new file mode 100644
index 0000000..fe67c76
--- /dev/null
+++ b/.ci_support/osx_arm64_python3.12.yaml
@@ -0,0 +1,22 @@
+MACOSX_DEPLOYMENT_TARGET:
+- '11.0'
+MACOSX_SDK_VERSION:
+- '11.0'
+channel_sources:
+- gurobi,conda-forge,defaults
+channel_targets:
+- funkelab main
+cxx_compiler:
+- clangxx
+cxx_compiler_version:
+- '17'
+macos_machine:
+- arm64-apple-darwin20.0.0
+pin_run_as_build:
+  python:
+    min_pin: x.x
+    max_pin: x.x
+python:
+- '3.12'
+target_platform:
+- osx-arm64
diff --git a/.ci_support/osx_arm64_python3.9.yaml b/.ci_support/osx_arm64_python3.9.yaml
index d54d0b5..8e7944d 100644
--- a/.ci_support/osx_arm64_python3.9.yaml
+++ b/.ci_support/osx_arm64_python3.9.yaml
@@ -9,7 +9,7 @@ channel_targets:
 cxx_compiler:
 - clangxx
 cxx_compiler_version:
-- '16'
+- '17'
 macos_machine:
 - arm64-apple-darwin20.0.0
 pin_run_as_build:
diff --git a/.ci_support/win_64_python3.12.yaml b/.ci_support/win_64_python3.12.yaml
new file mode 100644
index 0000000..a8a659d
--- /dev/null
+++ b/.ci_support/win_64_python3.12.yaml
@@ -0,0 +1,14 @@
+channel_sources:
+- gurobi,conda-forge,defaults
+channel_targets:
+- funkelab main
+cxx_compiler:
+- vs2019
+pin_run_as_build:
+  python:
+    min_pin: x.x
+    max_pin: x.x
+python:
+- '3.12'
+target_platform:
+- win-64
diff --git a/.github/workflows/conda-build.yml b/.github/workflows/conda-build.yml
index 9817d56..52cdb65 100644
--- a/.github/workflows/conda-build.yml
+++ b/.github/workflows/conda-build.yml
@@ -44,6 +44,10 @@ jobs:
             UPLOAD_PACKAGES: True
             os: macos
             runs_on: ['macos-13']
+          - CONFIG: osx_64_python3.12
+            UPLOAD_PACKAGES: True
+            os: macos
+            runs_on: ['macos-13']
           - CONFIG: osx_64_python3.9
             UPLOAD_PACKAGES: True
             os: macos
@@ -56,6 +60,10 @@ jobs:
             UPLOAD_PACKAGES: True
             os: macos
             runs_on: ['macos-13']
+          - CONFIG: osx_arm64_python3.12
+            UPLOAD_PACKAGES: True
+            os: macos
+            runs_on: ['macos-13']
           - CONFIG: osx_arm64_python3.9
             UPLOAD_PACKAGES: True
             os: macos
@@ -68,6 +76,10 @@ jobs:
             UPLOAD_PACKAGES: True
             os: windows
             runs_on: ['windows-latest']
+          - CONFIG: win_64_python3.12
+            UPLOAD_PACKAGES: True
+            os: windows
+            runs_on: ['windows-latest']
           - CONFIG: win_64_python3.9
             UPLOAD_PACKAGES: True
             os: windows
@@ -124,13 +136,6 @@ jobs:
         fi
         ./.scripts/run_osx_build.sh
 
-    - name: Install Miniconda for windows
-      uses: conda-incubator/setup-miniconda@a4260408e20b96e80095f42ff7f1a15b27dd94ca # v3.0.4
-      with:
-        miniforge-version: latest
-        miniforge-variant: Mambaforge
-      if: matrix.os == 'windows'
-
     - name: Build on windows
       shell: cmd
       run: |
@@ -139,6 +144,7 @@ jobs:
         set "sha=%GITHUB_SHA%"
         call ".scripts\run_win_build.bat"
       env:
+        MINIFORGE_HOME: D:\Miniforge
         PYTHONUNBUFFERED: 1
         CONFIG: ${{ matrix.CONFIG }}
         CI: github_actions
diff --git a/.scripts/build_steps.sh b/.scripts/build_steps.sh
index c8f58fb..352d052 100755
--- a/.scripts/build_steps.sh
+++ b/.scripts/build_steps.sh
@@ -31,18 +31,20 @@ pkgs_dirs:
 solver: libmamba
 
 CONDARC
+mv /opt/conda/conda-meta/history /opt/conda/conda-meta/history.$(date +%Y-%m-%d-%H-%M-%S)
+echo > /opt/conda/conda-meta/history
+micromamba install --root-prefix ~/.conda --prefix /opt/conda \
+    --yes --override-channels --channel conda-forge --strict-channel-priority \
+    pip  python=3.12 conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
 export CONDA_LIBMAMBA_SOLVER_NO_CHANNELS_FROM_INSTALLED=1
 
-mamba install --update-specs --yes --quiet --channel conda-forge --strict-channel-priority \
-    pip mamba conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
-mamba update --update-specs --yes --quiet --channel conda-forge --strict-channel-priority \
-    pip mamba conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
-
 # set up the condarc
 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}"
 
@@ -72,11 +74,10 @@ else
         --suppress-variables ${EXTRA_CB_OPTIONS:-} \
         --clobber-file "${CI_SUPPORT}/clobber_${CONFIG}.yaml" \
         --extra-meta flow_run_id="${flow_run_id:-}" remote_url="${remote_url:-}" sha="${sha:-}"
-
     ( startgroup "Inspecting artifacts" ) 2> /dev/null
 
-    # inspect_artifacts was only added in conda-forge-ci-setup 4.6.0
-    command -v inspect_artifacts >/dev/null 2>&1 && inspect_artifacts || echo "inspect_artifacts needs conda-forge-ci-setup >=4.6.0"
+    # inspect_artifacts was only added in conda-forge-ci-setup 4.9.4
+    command -v inspect_artifacts >/dev/null 2>&1 && inspect_artifacts --recipe-dir "${RECIPE_ROOT}" -m "${CONFIG_FILE}" || echo "inspect_artifacts needs conda-forge-ci-setup >=4.9.4"
 
     ( endgroup "Inspecting artifacts" ) 2> /dev/null
 
diff --git a/.scripts/run_osx_build.sh b/.scripts/run_osx_build.sh
index d12507d..1ef7c5e 100755
--- a/.scripts/run_osx_build.sh
+++ b/.scripts/run_osx_build.sh
@@ -7,28 +7,39 @@ source .scripts/logging_utils.sh
 set -xe
 
 MINIFORGE_HOME=${MINIFORGE_HOME:-${HOME}/miniforge3}
+MINIFORGE_HOME=${MINIFORGE_HOME%/} # remove trailing slash
 
-( 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-$(uname -m).sh"
-curl -L -O "${MINIFORGE_URL}/${MINIFORGE_FILE}"
-rm -rf ${MINIFORGE_HOME}
-bash $MINIFORGE_FILE -b -p ${MINIFORGE_HOME}
-
-( endgroup "Installing a fresh version of Miniforge" ) 2> /dev/null
+( startgroup "Provisioning base env with micromamba" ) 2> /dev/null
+MICROMAMBA_VERSION="1.5.10-0"
+if [[ "$(uname -m)" == "arm64" ]]; then
+  osx_arch="osx-arm64"
+else
+  osx_arch="osx-64"
+fi
+MICROMAMBA_URL="https://github.com/mamba-org/micromamba-releases/releases/download/${MICROMAMBA_VERSION}/micromamba-${osx_arch}"
+MAMBA_ROOT_PREFIX="${MINIFORGE_HOME}-micromamba-$(date +%s)"
+echo "Downloading micromamba ${MICROMAMBA_VERSION}"
+micromamba_exe="$(mktemp -d)/micromamba"
+curl -L -o "${micromamba_exe}" "${MICROMAMBA_URL}"
+chmod +x "${micromamba_exe}"
+echo "Creating environment"
+"${micromamba_exe}" create --yes --root-prefix "${MAMBA_ROOT_PREFIX}" --prefix "${MINIFORGE_HOME}" \
+  --channel conda-forge \
+  pip python=3.12 conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
+echo "Moving pkgs cache from ${MAMBA_ROOT_PREFIX} to ${MINIFORGE_HOME}"
+mv "${MAMBA_ROOT_PREFIX}/pkgs" "${MINIFORGE_HOME}"
+echo "Cleaning up micromamba"
+rm -rf "${MAMBA_ROOT_PREFIX}" "${micromamba_exe}" || true
+( endgroup "Provisioning base env with micromamba" ) 2> /dev/null
 
 ( startgroup "Configuring conda" ) 2> /dev/null
 
-source ${MINIFORGE_HOME}/etc/profile.d/conda.sh
+source "${MINIFORGE_HOME}/etc/profile.d/conda.sh"
 conda activate base
 export CONDA_SOLVER="libmamba"
 export CONDA_LIBMAMBA_SOLVER_NO_CHANNELS_FROM_INSTALLED=1
 
-mamba install --update-specs --quiet --yes --channel conda-forge --strict-channel-priority \
-    pip mamba conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
-mamba update --update-specs --yes --quiet --channel conda-forge --strict-channel-priority \
-    pip mamba conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
+
 
 
 
@@ -88,8 +99,8 @@ else
 
     ( startgroup "Inspecting artifacts" ) 2> /dev/null
 
-    # inspect_artifacts was only added in conda-forge-ci-setup 4.6.0
-    command -v inspect_artifacts >/dev/null 2>&1 && inspect_artifacts || echo "inspect_artifacts needs conda-forge-ci-setup >=4.6.0"
+    # inspect_artifacts was only added in conda-forge-ci-setup 4.9.4
+    command -v inspect_artifacts >/dev/null 2>&1 && inspect_artifacts --recipe-dir ./recipe -m ./.ci_support/${CONFIG}.yaml || echo "inspect_artifacts needs conda-forge-ci-setup >=4.9.4"
 
     ( endgroup "Inspecting artifacts" ) 2> /dev/null
 
diff --git a/.scripts/run_win_build.bat b/.scripts/run_win_build.bat
index 24df5d6..c5d46bc 100755
--- a/.scripts/run_win_build.bat
+++ b/.scripts/run_win_build.bat
@@ -3,30 +3,52 @@
 :: changes to this script, consider a proposal to conda-smithy so that other feedstocks can also
 :: benefit from the improvement.
 
-:: Note: we assume a Miniforge installation is available
-
 :: INPUTS (required environment variables)
 :: CONFIG: name of the .ci_support/*.yaml file for this job
 :: CI: azure, github_actions, or unset
+:: MINIFORGE_HOME: where to install the base conda environment
 :: UPLOAD_PACKAGES: true or false
 :: UPLOAD_ON_BRANCH: true or false
 
 setlocal enableextensions enabledelayedexpansion
 
+if "%MINIFORGE_HOME%"=="" set "MINIFORGE_HOME=%USERPROFILE%\Miniforge3"
+:: Remove trailing backslash, if present
+if "%MINIFORGE_HOME:~-1%"=="\" set "MINIFORGE_HOME=%MINIFORGE_HOME:~0,-1%"
+call :start_group "Provisioning base env with micromamba"
+set "MAMBA_ROOT_PREFIX=%MINIFORGE_HOME%-micromamba-%RANDOM%"
+set "MICROMAMBA_VERSION=1.5.10-0"
+set "MICROMAMBA_URL=https://github.com/mamba-org/micromamba-releases/releases/download/%MICROMAMBA_VERSION%/micromamba-win-64"
+set "MICROMAMBA_TMPDIR=%TMP%\micromamba-%RANDOM%"
+set "MICROMAMBA_EXE=%MICROMAMBA_TMPDIR%\micromamba.exe"
+
+echo Downloading micromamba %MICROMAMBA_VERSION%
+if not exist "%MICROMAMBA_TMPDIR%" mkdir "%MICROMAMBA_TMPDIR%"
+certutil -urlcache -split -f "%MICROMAMBA_URL%" "%MICROMAMBA_EXE%"
+if !errorlevel! neq 0 exit /b !errorlevel!
+
+echo Creating environment
+call "%MICROMAMBA_EXE%" create --yes --root-prefix "%MAMBA_ROOT_PREFIX%" --prefix "%MINIFORGE_HOME%" ^
+    --channel conda-forge ^
+    pip python=3.12 conda-build conda-forge-ci-setup=4 "conda-build>=24.1"
+if !errorlevel! neq 0 exit /b !errorlevel!
+echo Moving pkgs cache from %MAMBA_ROOT_PREFIX% to %MINIFORGE_HOME%
+move /Y "%MAMBA_ROOT_PREFIX%\pkgs" "%MINIFORGE_HOME%"
+if !errorlevel! neq 0 exit /b !errorlevel!
+echo Removing %MAMBA_ROOT_PREFIX%
+del /S /Q "%MAMBA_ROOT_PREFIX%"
+del /S /Q "%MICROMAMBA_TMPDIR%"
+call :end_group
+
 call :start_group "Configuring conda"
 
 :: Activate the base conda environment
-call activate base
+call "%MINIFORGE_HOME%\Scripts\activate.bat"
 :: Configure the solver
 set "CONDA_SOLVER=libmamba"
 if !errorlevel! neq 0 exit /b !errorlevel!
 set "CONDA_LIBMAMBA_SOLVER_NO_CHANNELS_FROM_INSTALLED=1"
 
-:: Provision the necessary dependencies to build the recipe later
-echo Installing dependencies
-mamba.exe install "python=3.10" pip mamba conda-build conda-forge-ci-setup=4 "conda-build>=24.1" -c conda-forge --strict-channel-priority --yes
-if !errorlevel! neq 0 exit /b !errorlevel!
-
 :: Set basic configuration
 echo Setting up configuration
 setup_conda_rc .\ ".\recipe" .\.ci_support\%CONFIG%.yaml
@@ -48,7 +70,7 @@ if NOT [%HOST_PLATFORM%] == [%BUILD_PLATFORM%] (
 )
 
 if NOT [%flow_run_id%] == [] (
-    set "EXTRA_CB_OPTIONS=%EXTRA_CB_OPTIONS% --extra-meta flow_run_id=%flow_run_id% remote_url=%remote_url% sha=%sha%"
+        set "EXTRA_CB_OPTIONS=%EXTRA_CB_OPTIONS% --extra-meta flow_run_id=%flow_run_id% remote_url=%remote_url% sha=%sha%"
 )
 
 call :end_group
@@ -59,8 +81,8 @@ conda-build.exe "recipe" -m .ci_support\%CONFIG%.yaml --suppress-variables %EXTR
 if !errorlevel! neq 0 exit /b !errorlevel!
 
 call :start_group "Inspecting artifacts"
-:: inspect_artifacts was only added in conda-forge-ci-setup 4.6.0
-WHERE inspect_artifacts >nul 2>nul && inspect_artifacts || echo "inspect_artifacts needs conda-forge-ci-setup >=4.6.0"
+:: inspect_artifacts was only added in conda-forge-ci-setup 4.9.4
+WHERE inspect_artifacts >nul 2>nul && inspect_artifacts --recipe-dir ".\recipe" -m .ci_support\%CONFIG%.yaml || echo "inspect_artifacts needs conda-forge-ci-setup >=4.9.4"
 call :end_group
 
 :: Prepare some environment variables for the upload step
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/conda_build_config.yaml b/recipe/conda_build_config.yaml
index 1506f00..75228f7 100644
--- a/recipe/conda_build_config.yaml
+++ b/recipe/conda_build_config.yaml
@@ -2,14 +2,17 @@ python:
   - 3.9
   - 3.10
   - 3.11
+  - 3.12  # [not linux]
 python_impl:
   - cpython
   - cpython
   - cpython
+  - cpython  # [not linux]
 numpy:
   - 1.22
   - 1.22
   - 1.22
+  - 1.22  # [not linux]
 channel_targets:
   - funkelab main
 channel_sources:
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index fae6527..d466ca0 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -1,5 +1,5 @@
 {% set name = "ilpy" %}
-{% set version = "0.4.0" %}
+{% set version = "0.4.1" %}
 
 package:
   name: {{ name|lower }}
@@ -7,10 +7,10 @@ package:
 
 source:
   url: https://pypi.io/packages/source/{{ name[0] }}/{{ name }}/{{ name.replace('-', '_') }}-{{ version }}.tar.gz
-  sha256: 5cee3c0e5fe6e48cbb4686a8d8362b5e5fa407ab242c480b3981beb7b3429f0c
+  sha256: e56988abe021398ac856ebdc669981028241eb5ecd6427eae315dbf96e2904f7
 
 build:
-  number: 1
+  number: 0
   script: "{{ PYTHON }} -m pip install . --no-deps -vv"
 
 requirements:
@@ -19,16 +19,19 @@ requirements:
     - cross-python_{{ target_platform }}    # [build_platform != target_platform]
     - python                                # [build_platform != target_platform]
     - cython =3.0.9                         # [build_platform != target_platform]
+    - setuptools ==71
   host:
     - python {{python}}
     - pip
     - cython =3.0.9
     - scip =9.1.0
-    - gurobi >=10.0,<12.0
+    - gurobi >=10.0,<11  # [linux]
+    - gurobi >=10.0,<=11.0.2  # [not linux]
   run:
     - python {{python}}
     - scip =9.1.0
-    - gurobi >=10.0,<12.0
+    - gurobi >=10.0,<11  # [linux]
+    - gurobi >=10.0,<=11.0.2  # [not linux]
 
 test: 
   imports: