diff --git a/.ci_support/linux_64_r_base4.2.yaml b/.ci_support/linux_64_r_base4.2.yaml
index 060d0c6..22ea1dd 100644
--- a/.ci_support/linux_64_r_base4.2.yaml
+++ b/.ci_support/linux_64_r_base4.2.yaml
@@ -23,7 +23,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.2'
 target_platform:
diff --git a/.ci_support/linux_64_r_base4.3.yaml b/.ci_support/linux_64_r_base4.3.yaml
index a9e9e76..4678a94 100644
--- a/.ci_support/linux_64_r_base4.3.yaml
+++ b/.ci_support/linux_64_r_base4.3.yaml
@@ -23,7 +23,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.3'
 target_platform:
diff --git a/.ci_support/linux_aarch64_r_base4.2.yaml b/.ci_support/linux_aarch64_r_base4.2.yaml
index b170261..741d596 100644
--- a/.ci_support/linux_aarch64_r_base4.2.yaml
+++ b/.ci_support/linux_aarch64_r_base4.2.yaml
@@ -27,7 +27,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.2'
 target_platform:
diff --git a/.ci_support/linux_aarch64_r_base4.3.yaml b/.ci_support/linux_aarch64_r_base4.3.yaml
index 188d2f8..12edeb7 100644
--- a/.ci_support/linux_aarch64_r_base4.3.yaml
+++ b/.ci_support/linux_aarch64_r_base4.3.yaml
@@ -27,7 +27,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.3'
 target_platform:
diff --git a/.ci_support/linux_ppc64le_r_base4.2.yaml b/.ci_support/linux_ppc64le_r_base4.2.yaml
index 9cbdd1b..6218212 100644
--- a/.ci_support/linux_ppc64le_r_base4.2.yaml
+++ b/.ci_support/linux_ppc64le_r_base4.2.yaml
@@ -23,7 +23,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.2'
 target_platform:
diff --git a/.ci_support/linux_ppc64le_r_base4.3.yaml b/.ci_support/linux_ppc64le_r_base4.3.yaml
index 036a54e..6f8dbb6 100644
--- a/.ci_support/linux_ppc64le_r_base4.3.yaml
+++ b/.ci_support/linux_ppc64le_r_base4.3.yaml
@@ -23,7 +23,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.3'
 target_platform:
diff --git a/.ci_support/migrations/proj931.yaml b/.ci_support/migrations/proj931.yaml
new file mode 100644
index 0000000..59f0a47
--- /dev/null
+++ b/.ci_support/migrations/proj931.yaml
@@ -0,0 +1,7 @@
+__migrator:
+  build_number: 1
+  kind: version
+  migration_number: 1
+migrator_ts: 1701494989.7141423
+proj:
+- 9.3.1
diff --git a/.ci_support/osx_64_r_base4.2.yaml b/.ci_support/osx_64_r_base4.2.yaml
index 2fba6e8..d5ba2b5 100644
--- a/.ci_support/osx_64_r_base4.2.yaml
+++ b/.ci_support/osx_64_r_base4.2.yaml
@@ -23,7 +23,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.2'
 target_platform:
diff --git a/.ci_support/osx_64_r_base4.3.yaml b/.ci_support/osx_64_r_base4.3.yaml
index b37e601..e033fbe 100644
--- a/.ci_support/osx_64_r_base4.3.yaml
+++ b/.ci_support/osx_64_r_base4.3.yaml
@@ -23,7 +23,7 @@ pin_run_as_build:
     min_pin: x.x
     max_pin: x.x
 proj:
-- 9.3.0
+- 9.3.1
 r_base:
 - '4.3'
 target_platform:
diff --git a/.scripts/build_steps.sh b/.scripts/build_steps.sh
index ab7bc8f..5382195 100755
--- a/.scripts/build_steps.sh
+++ b/.scripts/build_steps.sh
@@ -34,9 +34,9 @@ CONDARC
 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
+    pip mamba conda-build boa conda-forge-ci-setup=4
 mamba update --update-specs --yes --quiet --channel conda-forge --strict-channel-priority \
-    pip mamba conda-build conda-forge-ci-setup=4
+    pip mamba conda-build boa conda-forge-ci-setup=4
 
 # set up the condarc
 setup_conda_rc "${FEEDSTOCK_ROOT}" "${RECIPE_ROOT}" "${CONFIG_FILE}"
@@ -71,7 +71,7 @@ if [[ "${BUILD_WITH_CONDA_DEBUG:-0}" == 1 ]]; then
     # Drop into an interactive shell
     /bin/bash
 else
-    conda build "${RECIPE_ROOT}" -m "${CI_SUPPORT}/${CONFIG}.yaml" \
+    conda mambabuild "${RECIPE_ROOT}" -m "${CI_SUPPORT}/${CONFIG}.yaml" \
         --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:-}"
diff --git a/.scripts/run_osx_build.sh b/.scripts/run_osx_build.sh
index 24983bc..1fa8468 100755
--- a/.scripts/run_osx_build.sh
+++ b/.scripts/run_osx_build.sh
@@ -26,9 +26,9 @@ 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
+    pip mamba conda-build boa conda-forge-ci-setup=4
 mamba update --update-specs --yes --quiet --channel conda-forge --strict-channel-priority \
-    pip mamba conda-build conda-forge-ci-setup=4
+    pip mamba conda-build boa conda-forge-ci-setup=4
 
 
 
@@ -77,7 +77,7 @@ if [[ "${BUILD_WITH_CONDA_DEBUG:-0}" == 1 ]]; then
     /bin/bash
 else
 
-    conda build ./recipe -m ./.ci_support/${CONFIG}.yaml \
+    conda mambabuild ./recipe -m ./.ci_support/${CONFIG}.yaml \
         --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"
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 9aea6ad..d764df6 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -13,7 +13,7 @@ source:
   sha256: 5a7c4e994c4e50a1a77f38bac699cf029dffab5e344a52e931d9b3f19f2c0f04                       # [win and r_base=="4.1"]
 
 build:
-  number: 1
+  number: 2
   skip: true              # [win]
   merge_build_host: true  # [win]
   rpaths: