diff --git a/Tools/pixi-packages/README.md b/Tools/pixi-packages/README.md
index 94d606cee3439d..4cd48da0715cf9 100644
--- a/Tools/pixi-packages/README.md
+++ b/Tools/pixi-packages/README.md
@@ -20,14 +20,13 @@ Each package definition is contained in a subdirectory, but they share the build
 `build.sh` in this directory. Currently defined package variants:
 
 - `default`
-- `free-threading`
+- `freethreading`
 - `asan`: ASan-instrumented build
-- `tsan-free-threading`: TSan-instrumented free-threading build
+- `tsan_freethreading`: TSan-instrumented free-threading build
 
 ## Maintenance
 
-- Keep the `version` fields in each `recipe.yaml` up to date with the Python version
-- Keep the dependency requirements up to date in each `recipe.yaml`
+- Keep the `abi_tag` and `version` fields in each `pixi.toml` up to date with the Python version
 - Update `build.sh` for any breaking changes in the `configure` and `make` workflow
 
 ## Opportunities for future improvement
diff --git a/Tools/pixi-packages/asan/pixi.toml b/Tools/pixi-packages/asan/pixi.toml
index 001ff78fa5d8cb..7c8200067d8cdf 100644
--- a/Tools/pixi-packages/asan/pixi.toml
+++ b/Tools/pixi-packages/asan/pixi.toml
@@ -3,6 +3,11 @@ channels = ["https://prefix.dev/conda-forge"]
 platforms = ["osx-arm64", "linux-64"]
 preview = ["pixi-build"]
 
+[workspace.build-variants]
+variant = ["asan"]
+abi_tag = ["cp315"]
+version = ["3.15"]
+
 [package.build.backend]
 name = "pixi-build-rattler-build"
 version = "*"
diff --git a/Tools/pixi-packages/asan/recipe.yaml b/Tools/pixi-packages/asan/recipe.yaml
deleted file mode 100644
index dea88394ad9fe2..00000000000000
--- a/Tools/pixi-packages/asan/recipe.yaml
+++ /dev/null
@@ -1,63 +0,0 @@
-context:
-  # Keep up to date
-  version: "3.15"
-
-package:
-  name: python
-  version: ${{ version }}
-
-source:
-  - path: ../../..
-
-build:
-  files:
-    exclude:
-      - "*.o"
-  script:
-    file: ../build.sh
-    env:
-      PYTHON_VARIANT: "asan"
-
-# derived from https://github.com/conda-forge/python-feedstock/blob/main/recipe/meta.yaml
-requirements:
-  build:
-    - ${{ compiler('c') }}
-    - ${{ compiler('cxx') }}
-    - make
-    - pkg-config
-    # configure script looks for llvm-ar for lto
-    - if: osx
-      then:
-        - llvm-tools
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - binutils_impl_${{ target_platform }}
-    - clang-19
-    - llvm-tools-19
-
-  host:
-    - bzip2
-    - sqlite
-    - liblzma-devel
-    - zlib
-    - zstd
-    - openssl
-    - readline
-    - tk
-    # These two are just to get the headers needed for tk.h, but is unused
-    - xorg-libx11
-    - xorg-xorgproto
-    - ncurses
-    - libffi
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - libuuid
-    - libmpdec-devel
-    - expat
-
-about:
-  homepage: https://www.python.org/
-  license: Python-2.0
-  license_file: LICENSE
diff --git a/Tools/pixi-packages/asan/recipe.yaml b/Tools/pixi-packages/asan/recipe.yaml
new file mode 120000
index 00000000000000..90c5c497965560
--- /dev/null
+++ b/Tools/pixi-packages/asan/recipe.yaml
@@ -0,0 +1 @@
+../default/recipe.yaml
\ No newline at end of file
diff --git a/Tools/pixi-packages/build.sh b/Tools/pixi-packages/build.sh
index 8926de2603846f..1a4f5d6a26b415 100644
--- a/Tools/pixi-packages/build.sh
+++ b/Tools/pixi-packages/build.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if [[ "${PYTHON_VARIANT}" == "free-threading" ]]; then
+if [[ "${PYTHON_VARIANT}" == "freethreading" ]]; then
     echo "BUILD TYPE: FREE-THREADING"
     BUILD_DIR="../build_free_threading"
     CONFIGURE_EXTRA="--disable-gil"
@@ -9,7 +9,7 @@ elif [[ "${PYTHON_VARIANT}" == "asan" ]]; then
     BUILD_DIR="../build_asan"
     CONFIGURE_EXTRA="--with-address-sanitizer"
     export ASAN_OPTIONS="strict_init_order=true"
-elif [[ "${PYTHON_VARIANT}" == "tsan-free-threading" ]]; then
+elif [[ "${PYTHON_VARIANT}" == "tsan_freethreading" ]]; then
     echo "BUILD TYPE: TSAN FREE-THREADING"
     BUILD_DIR="../build_tsan_free_threading"
     CONFIGURE_EXTRA="--disable-gil --with-thread-sanitizer"
@@ -31,6 +31,7 @@ else
         --oldincludedir="${BUILD_PREFIX}/${HOST}/sysroot/usr/include" \
         --enable-shared \
         --srcdir="${SRC_DIR}" \
+        --with-system-expat \
         ${CONFIGURE_EXTRA}
 fi
 
diff --git a/Tools/pixi-packages/default/pixi.toml b/Tools/pixi-packages/default/pixi.toml
index 001ff78fa5d8cb..efc0892b45520f 100644
--- a/Tools/pixi-packages/default/pixi.toml
+++ b/Tools/pixi-packages/default/pixi.toml
@@ -3,6 +3,11 @@ channels = ["https://prefix.dev/conda-forge"]
 platforms = ["osx-arm64", "linux-64"]
 preview = ["pixi-build"]
 
+[workspace.build-variants]
+variant = ["default"]
+abi_tag = ["cp315"]
+version = ["3.15"]
+
 [package.build.backend]
 name = "pixi-build-rattler-build"
 version = "*"
diff --git a/Tools/pixi-packages/default/recipe.yaml b/Tools/pixi-packages/default/recipe.yaml
index eeb4052ec3859c..83f04736d7ed70 100644
--- a/Tools/pixi-packages/default/recipe.yaml
+++ b/Tools/pixi-packages/default/recipe.yaml
@@ -1,59 +1,86 @@
 context:
   # Keep up to date
-  version: "3.15"
+  version: ${{ version }}
+  variant: ${{ variant }}
+  freethreading_tag: ${{ "t" if "freethreading" in variant else "" }}
+  abi_tag: ${{ abi_tag }}
 
-package:
+recipe:
   name: python
-  version: ${{ version }}
 
 source:
   - path: ../../..
 
-build:
-  files:
-    exclude:
-      - "*.o"
-  script:
-    file: ../build.sh
+outputs:
+- package:
+    name: python_abi
+    version: ${{ version }}
+  build:
+    string: "0_${{ variant }}_${{ abi_tag }}"
+  requirements:
+    run_constraints:
+      - python ${{ version }}.* *_${{ variant }}_${{ abi_tag }}
 
-# derived from https://github.com/conda-forge/python-feedstock/blob/main/recipe/meta.yaml
-requirements:
+- package:
+    name: python
+    version: ${{ version }}
   build:
-    - ${{ compiler('c') }}
-    - ${{ compiler('cxx') }}
-    - make
-    - pkg-config
-    # configure script looks for llvm-ar for lto
-    - if: osx
-      then:
-        - llvm-tools
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - binutils_impl_${{ target_platform }}
-    - clang-19
-    - llvm-tools-19
-
-  host:
-    - bzip2
-    - sqlite
-    - liblzma-devel
-    - zlib
-    - zstd
-    - openssl
-    - readline
-    - tk
-    # These two are just to get the headers needed for tk.h, but is unused
-    - xorg-libx11
-    - xorg-xorgproto
-    - ncurses
-    - libffi
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - libuuid
-    - libmpdec-devel
-    - expat
+    string: "0_${{ variant }}_${{ abi_tag }}"
+    files:
+      exclude:
+        - "*.o"
+    script:
+      file: ../build.sh
+      env:
+        PYTHON_VARIANT: ${{ variant }}
+    python:
+      site_packages_path: "lib/python${{ version }}${{ freethreading_tag }}/site-packages"
+
+  # derived from https://github.com/conda-forge/python-feedstock/blob/main/recipe/meta.yaml
+  requirements:
+    build:
+      - ${{ compiler('c') }}
+      - ${{ compiler('cxx') }}
+      - make
+      - pkg-config
+      # configure script looks for llvm-ar for lto
+      - if: osx
+        then:
+          - llvm-tools
+
+    host:
+      - bzip2
+      - sqlite
+      - liblzma-devel
+      - zlib
+      - zstd
+      - openssl
+      - readline
+      - tk
+      # These two are just to get the headers needed for tk.h, but is unused
+      - xorg-libx11
+      - xorg-xorgproto
+      - ncurses
+      - libffi
+      - if: linux
+        then:
+          - libuuid
+      - libmpdec-devel
+      - expat
+      - if: c_compiler == "gcc" and "san" in variant
+        then:
+          - libsanitizer
+
+    ignore_run_exports:
+      from_package:
+        - xorg-libx11
+        - xorg-xorgproto
+
+    run_exports:
+      noarch:
+        - python
+      weak:
+        - python_abi ${{ version }}.* *_${{ variant }}_${{ abi_tag }}
 
 about:
   homepage: https://www.python.org/
diff --git a/Tools/pixi-packages/free-threading/recipe.yaml b/Tools/pixi-packages/free-threading/recipe.yaml
deleted file mode 100644
index 61c01562d35519..00000000000000
--- a/Tools/pixi-packages/free-threading/recipe.yaml
+++ /dev/null
@@ -1,63 +0,0 @@
-context:
-  # Keep up to date
-  version: "3.15"
-
-package:
-  name: python
-  version: ${{ version }}
-
-source:
-  - path: ../../..
-
-build:
-  files:
-    exclude:
-      - "*.o"
-  script:
-    file: ../build.sh
-    env:
-      PYTHON_VARIANT: "free-threading"
-
-# derived from https://github.com/conda-forge/python-feedstock/blob/main/recipe/meta.yaml
-requirements:
-  build:
-    - ${{ compiler('c') }}
-    - ${{ compiler('cxx') }}
-    - make
-    - pkg-config
-    # configure script looks for llvm-ar for lto
-    - if: osx
-      then:
-        - llvm-tools
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - binutils_impl_${{ target_platform }}
-    - clang-19
-    - llvm-tools-19
-
-  host:
-    - bzip2
-    - sqlite
-    - liblzma-devel
-    - zlib
-    - zstd
-    - openssl
-    - readline
-    - tk
-    # These two are just to get the headers needed for tk.h, but is unused
-    - xorg-libx11
-    - xorg-xorgproto
-    - ncurses
-    - libffi
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - libuuid
-    - libmpdec-devel
-    - expat
-
-about:
-  homepage: https://www.python.org/
-  license: Python-2.0
-  license_file: LICENSE
diff --git a/Tools/pixi-packages/free-threading/pixi.toml b/Tools/pixi-packages/freethreading/pixi.toml
similarity index 66%
rename from Tools/pixi-packages/free-threading/pixi.toml
rename to Tools/pixi-packages/freethreading/pixi.toml
index 001ff78fa5d8cb..a6369b02059572 100644
--- a/Tools/pixi-packages/free-threading/pixi.toml
+++ b/Tools/pixi-packages/freethreading/pixi.toml
@@ -3,6 +3,11 @@ channels = ["https://prefix.dev/conda-forge"]
 platforms = ["osx-arm64", "linux-64"]
 preview = ["pixi-build"]
 
+[workspace.build-variants]
+variant = ["freethreading"]
+abi_tag = ["cp315t"]
+version = ["3.15"]
+
 [package.build.backend]
 name = "pixi-build-rattler-build"
 version = "*"
diff --git a/Tools/pixi-packages/freethreading/recipe.yaml b/Tools/pixi-packages/freethreading/recipe.yaml
new file mode 120000
index 00000000000000..90c5c497965560
--- /dev/null
+++ b/Tools/pixi-packages/freethreading/recipe.yaml
@@ -0,0 +1 @@
+../default/recipe.yaml
\ No newline at end of file
diff --git a/Tools/pixi-packages/tsan-free-threading/recipe.yaml b/Tools/pixi-packages/tsan-free-threading/recipe.yaml
deleted file mode 100644
index dfae06ad7a51d5..00000000000000
--- a/Tools/pixi-packages/tsan-free-threading/recipe.yaml
+++ /dev/null
@@ -1,63 +0,0 @@
-context:
-  # Keep up to date
-  version: "3.15"
-
-package:
-  name: python
-  version: ${{ version }}
-
-source:
-  - path: ../../..
-
-build:
-  files:
-    exclude:
-      - "*.o"
-  script:
-    file: ../build.sh
-    env:
-      PYTHON_VARIANT: "tsan-free-threading"
-
-# derived from https://github.com/conda-forge/python-feedstock/blob/main/recipe/meta.yaml
-requirements:
-  build:
-    - ${{ compiler('c') }}
-    - ${{ compiler('cxx') }}
-    - make
-    - pkg-config
-    # configure script looks for llvm-ar for lto
-    - if: osx
-      then:
-        - llvm-tools
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - binutils_impl_${{ target_platform }}
-    - clang-19
-    - llvm-tools-19
-
-  host:
-    - bzip2
-    - sqlite
-    - liblzma-devel
-    - zlib
-    - zstd
-    - openssl
-    - readline
-    - tk
-    # These two are just to get the headers needed for tk.h, but is unused
-    - xorg-libx11
-    - xorg-xorgproto
-    - ncurses
-    - libffi
-    - if: linux
-      then:
-        - ld_impl_${{ target_platform }}
-        - libuuid
-    - libmpdec-devel
-    - expat
-
-about:
-  homepage: https://www.python.org/
-  license: Python-2.0
-  license_file: LICENSE
diff --git a/Tools/pixi-packages/tsan-free-threading/pixi.toml b/Tools/pixi-packages/tsan_freethreading/pixi.toml
similarity index 65%
rename from Tools/pixi-packages/tsan-free-threading/pixi.toml
rename to Tools/pixi-packages/tsan_freethreading/pixi.toml
index 001ff78fa5d8cb..be0515ee0bf065 100644
--- a/Tools/pixi-packages/tsan-free-threading/pixi.toml
+++ b/Tools/pixi-packages/tsan_freethreading/pixi.toml
@@ -3,6 +3,11 @@ channels = ["https://prefix.dev/conda-forge"]
 platforms = ["osx-arm64", "linux-64"]
 preview = ["pixi-build"]
 
+[workspace.build-variants]
+variant = ["tsan_freethreading"]
+abi_tag = ["cp315t"]
+version = ["3.15"]
+
 [package.build.backend]
 name = "pixi-build-rattler-build"
 version = "*"
diff --git a/Tools/pixi-packages/tsan_freethreading/recipe.yaml b/Tools/pixi-packages/tsan_freethreading/recipe.yaml
new file mode 120000
index 00000000000000..90c5c497965560
--- /dev/null
+++ b/Tools/pixi-packages/tsan_freethreading/recipe.yaml
@@ -0,0 +1 @@
+../default/recipe.yaml
\ No newline at end of file