diff --git a/.github/workflows/installers-conda.yml b/.github/workflows/installers-conda.yml
index 5d4ad4027e5..b9f617dee50 100644
--- a/.github/workflows/installers-conda.yml
+++ b/.github/workflows/installers-conda.yml
@@ -171,6 +171,10 @@ jobs:
         if: runner.os == 'Windows'
         uses: mamba-org/setup-micromamba@v1
         with:
+          conda-rc: |
+            conda_build:
+              pkg_format: '2'
+              zstd_compression_level: '19'
           environment-file: installers-conda/build-environment.yml
           environment-name: spy-inst
           create-args: >-
@@ -184,6 +188,10 @@ jobs:
         if: runner.os != 'Windows'
         uses: mamba-org/setup-micromamba@v1
         with:
+          conda-rc: |
+            conda_build:
+              pkg_format: '2'
+              zstd_compression_level: '19'
           environment-file: installers-conda/build-environment.yml
           environment-name: spy-inst
           create-args: >-
diff --git a/installers-conda/build_conda_pkgs.py b/installers-conda/build_conda_pkgs.py
index b56c6c003ec..8de362c1a0d 100644
--- a/installers-conda/build_conda_pkgs.py
+++ b/installers-conda/build_conda_pkgs.py
@@ -177,7 +177,8 @@ def build(self):
                              f"{self.name}={self.version}...")
             check_call([
                 "conda", "mambabuild",
-                "--no-test", "--skip-existing", "--build-id-pat={n}",
+                "--skip-existing", "--build-id-pat={n}",
+                "--no-test", "--no-anaconda-upload",
                 str(self._fdstk_path / "recipe")
             ])
         finally: