diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 04859603..e20845b0 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: install mamba
       uses: mamba-org/setup-micromamba@v1
       with:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 742f2818..e3cd5b83 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,13 +16,27 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.7]
+        conda-channel: ['conda-forge', 'conda-canary/label/dev']
+        include:
+          # Lowest versions to test for.
+          - conda-channel: 'conda-forge'
+            conda-build-version: '3.25'
+            python-version: '3.8'
+          # Unbound/dev versions to test for.
+          - conda-channel: 'conda-canary/label/dev'
+            conda-build-version: '*'
+            python-version: '*'
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: install mamba
       uses: mamba-org/setup-micromamba@v1
       with:
         environment-file: tests/env.yml
+        create-args: >-
+          --channel-priority=flexible
+          python=${{ matrix.python-version }}
+          ${{ matrix.conda-channel }}::conda
+          ${{ matrix.conda-channel }}::conda-build=${{ matrix.conda-build-version }}
     - name: Install boa
       shell: bash -l {0}
       run: |
diff --git a/boa/cli/boa.py b/boa/cli/boa.py
index 1a26ec8e..89a68fb5 100644
--- a/boa/cli/boa.py
+++ b/boa/cli/boa.py
@@ -4,6 +4,8 @@
 import sys
 import argparse
 
+from conda.base.context import context
+
 from boa.core import monkey_patch_emscripten
 
 if any("emscripten" in arg for arg in sys.argv):
@@ -14,7 +16,7 @@
 from boa._version import __version__
 from boa.core.utils import init_api_context
 
-from conda_build.conda_interface import cc_conda_build
+cc_conda_build = context.conda_build if hasattr(context, "conda_build") else {}
 
 banner = r"""
            _
diff --git a/boa/cli/mambabuild.py b/boa/cli/mambabuild.py
index 65aaa4e5..00ca3a63 100644
--- a/boa/cli/mambabuild.py
+++ b/boa/cli/mambabuild.py
@@ -105,7 +105,7 @@ def _get_solver(channel_urls, subdir, output_folder):
     return solver
 
 
-def mamba_get_install_actions(
+def mamba_get_package_records(
     prefix,
     specs,
     env,
@@ -138,7 +138,8 @@ def mamba_get_install_actions(
 
     _specs = [s.conda_build_form() for s in _specs]
     try:
-        solution = solver.solve_for_action(_specs, prefix)
+        # We only create fresh environments in builds and can ignore unlink precs.
+        _, link_precs = solver.solve_for_unlink_link_precs(_specs, prefix)
     except RuntimeError as e:
         conflict_packages = parse_problems(str(e))
 
@@ -149,10 +150,54 @@ def mamba_get_install_actions(
         err.subdir = subdir
         raise err
 
-    return solution
-
+    return link_precs
+
+
+if hasattr(conda_build.environ, "get_package_records"):
+    # conda-build>=24.1 avoids the legacy "actions"/"Dist"-based installs.
+    conda_build.environ.get_package_records = mamba_get_package_records
+else:
+    # conda-build<24.1 needs get_package_records' result wrapped in "actions" dict.
+    def mamba_get_install_actions(
+        prefix,
+        specs,
+        env,
+        retries=0,
+        subdir=None,
+        verbose=True,
+        debug=False,
+        locking=True,
+        bldpkgs_dirs=None,
+        timeout=900,
+        disable_pip=False,
+        max_env_retry=3,
+        output_folder=None,
+        channel_urls=None,
+    ):
+        from conda.models.dist import Dist
+        from conda.plan import get_blank_actions
+
+        link_precs = mamba_get_package_records(
+            prefix=prefix,
+            specs=specs,
+            env=env,
+            retries=retries,
+            subdir=subdir,
+            verbose=verbose,
+            debug=debug,
+            locking=locking,
+            bldpkgs_dirs=bldpkgs_dirs,
+            timeout=timeout,
+            disable_pip=disable_pip,
+            max_env_retry=max_env_retry,
+            output_folder=output_folder,
+            channel_urls=channel_urls,
+        )
+        actions = get_blank_actions(prefix)
+        actions["LINK"].extend(Dist(prec) for prec in link_precs)
+        return actions
 
-conda_build.environ.get_install_actions = mamba_get_install_actions
+    conda_build.environ.get_install_actions = mamba_get_install_actions
 
 
 def prepare(**kwargs):
diff --git a/boa/core/build.py b/boa/core/build.py
index 33c43d81..2f6a2e7c 100644
--- a/boa/core/build.py
+++ b/boa/core/build.py
@@ -25,7 +25,7 @@
 import conda_package_handling.api
 
 # used to get version
-from conda_build.conda_interface import env_path_backup_var_exists, TemporaryDirectory
+from conda.gateways.disk.create import TemporaryDirectory
 from conda_build.utils import tmp_chdir
 
 from conda_build import source, utils
@@ -44,7 +44,11 @@
 if sys.platform == "win32":
     import boa.core.windows as windows
 
-from boa.core.utils import shell_path, get_sys_vars_stubs
+from boa.core.utils import (
+    env_path_backup_var_exists,
+    get_sys_vars_stubs,
+    shell_path,
+)
 from boa.core.recipe_handling import copy_recipe
 from boa.core.config import boa_config
 from boa.tui.exceptions import BoaRunBuildException
diff --git a/boa/core/metadata.py b/boa/core/metadata.py
index ecf92145..c82aaf86 100644
--- a/boa/core/metadata.py
+++ b/boa/core/metadata.py
@@ -149,7 +149,7 @@ def get_value(self, in_key: str, default: Any = None, autotype=True) -> Any:
             if autotype and default is None and FIELDS.get(section, {}).get(key):
                 default = FIELDS[section][key]()
 
-        section = self.output.sections.get(section, {})
+        section = self.meta.get(section, {})
         if isinstance(section, list):
             return section[int(num)].get(key, default)
         else:
diff --git a/boa/core/monkey_patch_emscripten.py b/boa/core/monkey_patch_emscripten.py
index 4d7e97e8..0b58967e 100644
--- a/boa/core/monkey_patch_emscripten.py
+++ b/boa/core/monkey_patch_emscripten.py
@@ -32,8 +32,9 @@ def patch():
     # CONDA-BUILD MONKEY-PATCH
     ###############################################
 
+    from conda.base.context import non_x86_machines as non_x86_linux_machines
+
     from conda_build import utils, variants, environ
-    from conda_build.conda_interface import non_x86_linux_machines
     from conda_build import metadata
     from conda_build.features import feature_list
 
diff --git a/boa/core/solver.py b/boa/core/solver.py
index 7779c7a9..b23027a1 100644
--- a/boa/core/solver.py
+++ b/boa/core/solver.py
@@ -4,24 +4,27 @@
 import os
 import tempfile
 
+from boltons.setutils import IndexedSet
+
 from conda.base.constants import ChannelPriority
 from conda.core.solve import diff_for_unlink_link_precs
 from conda.common.serialize import json_dump
 from conda.models.prefix_graph import PrefixGraph
 from conda.core.prefix_data import PrefixData
-from conda._vendor.boltons.setutils import IndexedSet
 from conda.models.match_spec import MatchSpec
 from conda.common.url import remove_auth, split_anaconda_token
 from conda.core.index import _supplement_index_with_system
 from conda.base.context import context
-from conda.plan import get_blank_actions
-from conda.models.dist import Dist
-from conda_build.conda_interface import pkgs_dirs
 from conda.core.package_cache_data import PackageCacheData
 
 import libmambapy
 
-from boa.core.utils import get_index, load_channels, to_package_record_from_subjson
+from boa.core.utils import (
+    get_index,
+    load_channels,
+    pkgs_dirs,
+    to_package_record_from_subjson,
+)
 from boa.core.config import boa_config
 
 console = boa_config.console
@@ -59,7 +62,9 @@ def get_url_from_channel(c):
         return split_anaconda_token(remove_auth(c))[0]
 
 
-def to_action(specs_to_add, specs_to_remove, prefix, to_link, to_unlink, index):
+def to_unlink_link_precs(
+    specs_to_add, specs_to_remove, prefix, to_link, to_unlink, index
+):
     to_link_records = []
 
     prefix_data = PrefixData(prefix)
@@ -85,10 +90,7 @@ def to_action(specs_to_add, specs_to_remove, prefix, to_link, to_unlink, index):
         specs_to_add=specs_to_add,
     )
 
-    actions = get_blank_actions(prefix)
-    actions["UNLINK"].extend(Dist(prec) for prec in unlink_precs)
-    actions["LINK"].extend(Dist(prec) for prec in link_precs)
-    return actions
+    return unlink_precs, link_precs
 
 
 def get_virtual_packages():
@@ -238,7 +240,7 @@ def solve(self, specs, pkg_cache_path=None):
         package_cache = libmambapy.MultiPackageCache(pkg_cache_path)
         return libmambapy.Transaction(api_solver, package_cache)
 
-    def solve_for_action(self, specs, prefix):
+    def solve_for_unlink_link_precs(self, specs, prefix):
         t = self.solve(specs)
         if not boa_config.quiet and not boa_config.is_mambabuild:
             t.print()
@@ -247,7 +249,7 @@ def solve_for_action(self, specs, prefix):
         specs_to_add = [MatchSpec(m) for m in mmb_specs[0]]
         specs_to_remove = [MatchSpec(m) for m in mmb_specs[1]]
 
-        return to_action(
+        return to_unlink_link_precs(
             specs_to_add,
             specs_to_remove,
             prefix,
diff --git a/boa/core/test.py b/boa/core/test.py
index 525a13a4..7fed5848 100644
--- a/boa/core/test.py
+++ b/boa/core/test.py
@@ -16,6 +16,7 @@
 from libmambapy import PrefixData
 from libmambapy import Context as MambaContext
 
+from conda.common.url import path_to_url
 from conda.gateways.disk.create import mkdir_p
 
 from conda_build.utils import CONDA_PACKAGE_EXTENSIONS, get_site_packages
@@ -25,11 +26,6 @@
     get_all_replacements,
     log_stats,
 )
-from conda_build.conda_interface import (
-    url_path,
-    env_path_backup_var_exists,
-    pkgs_dirs,
-)
 from conda_build.create_test import create_all_test_files
 from conda_build.post import post_build
 from conda_build.render import bldpkg_path, try_download
@@ -40,7 +36,7 @@
 from conda_build import utils
 from conda_build.environ import clean_pkg_cache
 
-from boa.core.utils import shell_path
+from boa.core.utils import env_path_backup_var_exists, pkgs_dirs, shell_path
 from boa.core.recipe_output import Output
 from boa.core.metadata import MetaData
 from boa.core import environ
@@ -359,7 +355,7 @@ def _construct_metadata_for_test_from_package(package, config):
 
     metadata.config.used_vars = list(hash_input.keys())
     urls = list(utils.ensure_list(metadata.config.channel_urls))
-    local_path = url_path(local_channel)
+    local_path = path_to_url(local_channel)
     # replace local with the appropriate real channel.  Order is maintained.
     urls = [url if url != "local" else local_path for url in urls]
     if local_path not in urls:
@@ -714,7 +710,10 @@ def run_test(
         not hasattr(recipedir_or_package_or_metadata, "config")
         and os.path.isfile(recipedir_or_package_or_metadata)
         and recipedir_or_package_or_metadata.endswith(CONDA_PACKAGE_EXTENSIONS)
-        and os.path.dirname(recipedir_or_package_or_metadata) in pkgs_dirs[0]
+        and any(
+            os.path.dirname(recipedir_or_package_or_metadata) in pkgs_dir
+            for pkgs_dir in pkgs_dirs
+        )
     )
     if not in_pkg_cache:
         clean_pkg_cache(metadata.dist(), metadata.config)
diff --git a/boa/core/utils.py b/boa/core/utils.py
index 927590b7..89516fd4 100644
--- a/boa/core/utils.py
+++ b/boa/core/utils.py
@@ -14,7 +14,6 @@
 from conda_build import utils
 from conda_build.config import get_or_merge_config
 from conda_build.variants import find_config_files, parse_config_file, combine_specs
-from conda_build import __version__ as cb_version
 from conda.base.constants import ChannelPriority
 from conda.gateways.connection.session import CondaHttpAuth
 from conda.core.index import check_allowlist
@@ -33,10 +32,8 @@
 
 console = boa_config.console
 
-if "+" in cb_version:
-    cb_version = cb_version[: cb_version.index("+")]
-cb_split_version = tuple(int(x) for x in cb_version.split("."))
-
+env_path_backup_var_exists = os.environ.get("CONDA_PATH_BACKUP", None)
+pkgs_dirs = list(context.pkgs_dirs)
 
 if "bsd" in sys.platform:
     shell_path = "/bin/sh"
@@ -58,11 +55,7 @@ def get_config(
         variant = {}
     config = get_or_merge_config(config, variant)
 
-    if cb_split_version >= (3, 20, 5):
-        config_files = find_config_files(folder, config)
-    else:
-        config_files = find_config_files(folder)
-
+    config_files = find_config_files(folder, config)
     all_files = [os.path.abspath(p) for p in config_files + additional_files]
 
     # reverse files an uniquify
diff --git a/setup.py b/setup.py
index 28c6dd47..7cf1d867 100644
--- a/setup.py
+++ b/setup.py
@@ -20,6 +20,7 @@
     "prompt-toolkit",
     "joblib",
     "beautifulsoup4",
+    "boltons",
 ]
 
 setup(
diff --git a/tests/env.yml b/tests/env.yml
index cb9dfb5c..f869910b 100644
--- a/tests/env.yml
+++ b/tests/env.yml
@@ -4,10 +4,11 @@ channels:
 dependencies:
   - python>=3.7
   - pip
+  - boltons
   - conda
   - libmambapy >=1.5,<1.6
   - pytest
-  - "conda-build>=3.20"
+  - conda-build >=3.25
   - conda-index
   - ruamel
   - ruamel.yaml