diff --git a/.ci_support/osx_64_.yaml b/.ci_support/osx_64_.yaml
index 9a1d0e24..4a8413c0 100644
--- a/.ci_support/osx_64_.yaml
+++ b/.ci_support/osx_64_.yaml
@@ -1,7 +1,7 @@
 MACOSX_DEPLOYMENT_TARGET:
 - '11.0'
 MACOSX_SDK_VERSION:
-- '11.0'
+- '13.3'
 c_compiler:
 - clang
 c_compiler_version:
diff --git a/.github/scripts/nightly/cpp20.patch b/.github/scripts/nightly/cpp20.patch
deleted file mode 100644
index 769c5efc..00000000
--- a/.github/scripts/nightly/cpp20.patch
+++ /dev/null
@@ -1,100 +0,0 @@
-diff --git a/recipe/build-libtiledbsoma.sh b/recipe/build-libtiledbsoma.sh
-index 12d4f4f..5d50926 100644
---- a/recipe/build-libtiledbsoma.sh
-+++ b/recipe/build-libtiledbsoma.sh
-@@ -2,6 +2,9 @@
- 
- set -exo pipefail
- 
-+# Clear default compiler flags
-+export CXXFLAGS=${CXXFLAGS//"-fvisibility-inlines-hidden"/}
-+
- mkdir libtiledbsoma-build && cd libtiledbsoma-build
- 
- cmake \
-diff --git a/recipe/build-r-tiledbsoma.sh b/recipe/build-r-tiledbsoma.sh
-index ffb435e..5a02821 100644
---- a/recipe/build-r-tiledbsoma.sh
-+++ b/recipe/build-r-tiledbsoma.sh
-@@ -4,21 +4,28 @@ set -ex
- 
- cd apis/r
- 
-+# Clear default compiler flags
-+export CXXFLAGS=${CXXFLAGS//"-fvisibility-inlines-hidden"/}
-+
- export DISABLE_AUTOBREW=1
- 
- # https://github.com/conda-forge/r-tiledb-feedstock/commit/29cb6816636e7b5b58545e1407a8f0c29ff9dc39
--if [[ $target_platform  == osx-64 ]]; then
-+if [[ $target_platform == osx-* ]]; then
-   export NN_CXX_ORIG=$CXX
-   export NN_CC_ORIG=$CC
-   export CXX=$RECIPE_DIR/cxx_wrap.sh
-   export CC=$RECIPE_DIR/cc_wrap.sh
--  mkdir -p ~/.R
--  echo CC=$RECIPE_DIR/cc_wrap.sh > ~/.R/Makevars
--  echo CXX=$RECIPE_DIR/cxx_wrap.sh >> ~/.R/Makevars
--  echo CXX17=$RECIPE_DIR/cxx_wrap.sh >> ~/.R/Makevars
- fi
- 
--export CXX17FLAGS="-Wno-deprecated-declarations -Wno-deprecated"
-+export CXX="$CXX -std=c++20 -fPIC"
-+export CXX20="$CXX"
-+
-+mkdir -p ~/.R
-+echo CC="$CC" > ~/.R/Makevars
-+echo CXX="$CXX" >> ~/.R/Makevars
-+echo CXX20="$CXX20" >> ~/.R/Makevars
-+
-+export CXX20FLAGS="-Wno-deprecated-declarations -Wno-deprecated"
- 
- # https://conda-forge.org/docs/maintainer/knowledge_base/#newer-c-features-with-old-sdk
- if [[ $target_platform == osx-*  ]]; then
-diff --git a/recipe/build-tiledbsoma-py.sh b/recipe/build-tiledbsoma-py.sh
-index a55c068..1cb92ce 100644
---- a/recipe/build-tiledbsoma-py.sh
-+++ b/recipe/build-tiledbsoma-py.sh
-@@ -4,6 +4,9 @@ set -ex
- 
- cd apis/python
- 
-+# Clear default compiler flags
-+export CXXFLAGS=${CXXFLAGS//"-fvisibility-inlines-hidden"/}
-+
- echo
- echo "PKG_VERSION IS <<$PKG_VERSION>>"
- echo
-diff --git a/recipe/cc_wrap.sh b/recipe/cc_wrap.sh
-index a2bfc0c..1589e33 100755
---- a/recipe/cc_wrap.sh
-+++ b/recipe/cc_wrap.sh
-@@ -1,4 +1,3 @@
- #!/bin/sh
- 
--args="${@##-mmacosx-version-min=10.9*}"
--$NN_CC_ORIG $args -mmacosx-version-min=11.0
-+$NN_CC_ORIG "$@" -mmacosx-version-min=13.3
-diff --git a/recipe/conda_build_config.yaml b/recipe/conda_build_config.yaml
-index 0c0129b..c4a9d77 100644
---- a/recipe/conda_build_config.yaml
-+++ b/recipe/conda_build_config.yaml
-@@ -1,7 +1,7 @@
- # https://conda-forge.org/docs/maintainer/knowledge_base/#requiring-newer-macos-sdks
- # https://conda-forge.org/news/2024/03/24/stdlib-migration/
- MACOSX_SDK_VERSION:  # [osx and x86_64]
--  - 11.0            # [osx and x86_64]
-+  - 13.3             # [osx and x86_64]
- c_stdlib_version:              # [osx and x86_64]
-   - 11.0                       # [osx and x86_64]
- channel_sources:
-diff --git a/recipe/cxx_wrap.sh b/recipe/cxx_wrap.sh
-index 5d9def4..c8428cb 100755
---- a/recipe/cxx_wrap.sh
-+++ b/recipe/cxx_wrap.sh
-@@ -1,4 +1,3 @@
- #!/bin/sh
- 
--args="${@##-mmacosx-version-min=10.9*}"
--$NN_CXX_ORIG $args -mmacosx-version-min=11.0
-+$NN_CXX_ORIG "$@" -mmacosx-version-min=13.3
diff --git a/.github/scripts/nightly/update-feedstock.sh b/.github/scripts/nightly/update-feedstock.sh
index 911ec579..944e8739 100644
--- a/.github/scripts/nightly/update-feedstock.sh
+++ b/.github/scripts/nightly/update-feedstock.sh
@@ -16,9 +16,5 @@ sed -i \
   s/"tiledb rc"/"tiledb nightlies"/ \
   recipe/conda_build_config.yaml
 
-# Apply patch from Xanthos to support C++20
-# https://github.com/TileDB-Inc/tiledbsoma-feedstock/pull/246
-patch -p1 < .github/scripts/nightly/cpp20.patch
-
 # Print differences
 git --no-pager diff conda-forge.yml recipe/conda_build_config.yaml
diff --git a/.gitignore b/.gitignore
index 179afe55..bb385366 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,6 @@
 /build_artifacts
 
 *.pyc
+
+# Rattler-build's artifacts are in `output` when not specifying anything.
+/output
diff --git a/recipe/build-libtiledbsoma.sh b/recipe/build-libtiledbsoma.sh
index 12d4f4fc..5d50926d 100644
--- a/recipe/build-libtiledbsoma.sh
+++ b/recipe/build-libtiledbsoma.sh
@@ -2,6 +2,9 @@
 
 set -exo pipefail
 
+# Clear default compiler flags
+export CXXFLAGS=${CXXFLAGS//"-fvisibility-inlines-hidden"/}
+
 mkdir libtiledbsoma-build && cd libtiledbsoma-build
 
 cmake \
diff --git a/recipe/build-r-tiledbsoma.sh b/recipe/build-r-tiledbsoma.sh
index ffb435e8..5a02821a 100644
--- a/recipe/build-r-tiledbsoma.sh
+++ b/recipe/build-r-tiledbsoma.sh
@@ -4,21 +4,28 @@ set -ex
 
 cd apis/r
 
+# Clear default compiler flags
+export CXXFLAGS=${CXXFLAGS//"-fvisibility-inlines-hidden"/}
+
 export DISABLE_AUTOBREW=1
 
 # https://github.com/conda-forge/r-tiledb-feedstock/commit/29cb6816636e7b5b58545e1407a8f0c29ff9dc39
-if [[ $target_platform  == osx-64 ]]; then
+if [[ $target_platform == osx-* ]]; then
   export NN_CXX_ORIG=$CXX
   export NN_CC_ORIG=$CC
   export CXX=$RECIPE_DIR/cxx_wrap.sh
   export CC=$RECIPE_DIR/cc_wrap.sh
-  mkdir -p ~/.R
-  echo CC=$RECIPE_DIR/cc_wrap.sh > ~/.R/Makevars
-  echo CXX=$RECIPE_DIR/cxx_wrap.sh >> ~/.R/Makevars
-  echo CXX17=$RECIPE_DIR/cxx_wrap.sh >> ~/.R/Makevars
 fi
 
-export CXX17FLAGS="-Wno-deprecated-declarations -Wno-deprecated"
+export CXX="$CXX -std=c++20 -fPIC"
+export CXX20="$CXX"
+
+mkdir -p ~/.R
+echo CC="$CC" > ~/.R/Makevars
+echo CXX="$CXX" >> ~/.R/Makevars
+echo CXX20="$CXX20" >> ~/.R/Makevars
+
+export CXX20FLAGS="-Wno-deprecated-declarations -Wno-deprecated"
 
 # https://conda-forge.org/docs/maintainer/knowledge_base/#newer-c-features-with-old-sdk
 if [[ $target_platform == osx-*  ]]; then
diff --git a/recipe/build-tiledbsoma-py.sh b/recipe/build-tiledbsoma-py.sh
index a55c0684..1cb92ce8 100644
--- a/recipe/build-tiledbsoma-py.sh
+++ b/recipe/build-tiledbsoma-py.sh
@@ -4,6 +4,9 @@ set -ex
 
 cd apis/python
 
+# Clear default compiler flags
+export CXXFLAGS=${CXXFLAGS//"-fvisibility-inlines-hidden"/}
+
 echo
 echo "PKG_VERSION IS <<$PKG_VERSION>>"
 echo
diff --git a/recipe/cc_wrap.sh b/recipe/cc_wrap.sh
index a2bfc0c9..1589e33d 100755
--- a/recipe/cc_wrap.sh
+++ b/recipe/cc_wrap.sh
@@ -1,4 +1,3 @@
 #!/bin/sh
 
-args="${@##-mmacosx-version-min=10.9*}"
-$NN_CC_ORIG $args -mmacosx-version-min=11.0
+$NN_CC_ORIG "$@" -mmacosx-version-min=13.3
diff --git a/recipe/conda_build_config.yaml b/recipe/conda_build_config.yaml
index 1e171f62..7d8464dd 100644
--- a/recipe/conda_build_config.yaml
+++ b/recipe/conda_build_config.yaml
@@ -1,7 +1,7 @@
 # https://conda-forge.org/docs/maintainer/knowledge_base/#requiring-newer-macos-sdks
 # https://conda-forge.org/news/2024/03/24/stdlib-migration/
 MACOSX_SDK_VERSION:  # [osx and x86_64]
-  - 11.0            # [osx and x86_64]
+  - 13.3             # [osx and x86_64]
 c_stdlib_version:              # [osx and x86_64]
   - 11.0                       # [osx and x86_64]
 channel_sources:
diff --git a/recipe/cxx_wrap.sh b/recipe/cxx_wrap.sh
index 5d9def44..c8428cb4 100755
--- a/recipe/cxx_wrap.sh
+++ b/recipe/cxx_wrap.sh
@@ -1,4 +1,3 @@
 #!/bin/sh
 
-args="${@##-mmacosx-version-min=10.9*}"
-$NN_CXX_ORIG $args -mmacosx-version-min=11.0
+$NN_CXX_ORIG "$@" -mmacosx-version-min=13.3
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index fe378474..38361968 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -1,6 +1,6 @@
 {% set name = "tiledbsoma" %}
-{% set version = "1.15.7" %}
-{% set sha256 = "ecdcafc2cb83e392e1102fea11e910548bcacdb854b5bc365c96ef940fed0c3f" %}
+{% set version = "1.16.0" %}
+{% set sha256 = "tbd" %}
 # This is the SHA256 of
 #   TileDB-SOMA-i.j.k.tar.gz
 # from
@@ -16,17 +16,16 @@ package:
   version: {{ version }}
 
 # Post-tag real thing:
-source:
-  url: https://github.com/single-cell-data/TileDB-SOMA/archive/{{ version }}.tar.gz
-  sha256: {{ sha256 }}
+# source:
+#   url: https://github.com/single-cell-data/TileDB-SOMA/archive/{{ version }}.tar.gz
+#   sha256: {{ sha256 }}
 
 # Pre-tag canary "will Conda be green if we release":
-#source:
-#  git_url: https://github.com/single-cell-data/TileDB-SOMA.git
-#  # release-1.15 branch 2025-01-24
-#  git_rev: ceb4a3682663dfc74a346c91cc5bfa85a0b0674c
-#  git_depth: -1
-#  # hoping to be 1.15.5 <-- FILL IN HERE
+source:
+ git_url: https://github.com/single-cell-data/TileDB-SOMA.git
+ git_rev: dad714f7e09dbebe9105cebb3f11ad8d646d6c4c
+ git_depth: -1
+ # hoping to be 1.16.0 <-- FILL IN HERE
 
 build:
   number: 0