diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index eb7523c..461498d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -30,6 +30,8 @@ jobs:
         with:
           environment-name: ci
           environment-file: environment.yaml
+          create-args: >-
+            mamba
           init-shell: bash
           cache-environment: true
           post-cleanup: 'all'
@@ -66,6 +68,8 @@ jobs:
         with:
           environment-name: ci
           environment-file: environment.yaml
+          create-args: >-
+            mamba
           init-shell: bash
           cache-environment: true
           post-cleanup: 'all'
@@ -104,6 +108,8 @@ jobs:
         with:
           environment-name: ci
           environment-file: environment.yaml
+          create-args: >-
+            mamba
           init-shell: bash
           cache-environment: true
           post-cleanup: 'all'
@@ -130,6 +136,8 @@ jobs:
         with:
           environment-name: ci
           environment-file: environment.yaml
+          create-args: >-
+            mamba
           init-shell: bash
           cache-environment: true
           post-cleanup: 'all'
diff --git a/noxfile.py b/noxfile.py
index eb28591..fd2ba8d 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -6,21 +6,11 @@ from pathlib import Path
 import nox
 import nox.registry
 
-MICROMAMBA = shutil.which("micromamba")
-
 CURRENT_DIR = Path(__file__).parent.resolve()
 TARGET_DIR = CURRENT_DIR / "target"
 COVERAGE_DIR = TARGET_DIR / "debug/coverage"
 
-if MICROMAMBA:
-    BIN_DIR = CURRENT_DIR / "build" / "bin"
-    BIN_DIR.mkdir(exist_ok=True, parents=True)
-    CONDA = BIN_DIR / "conda"
-    if not CONDA.is_file():
-        CONDA.hardlink_to(MICROMAMBA)
-    os.environ["PATH"] = os.pathsep.join([str(BIN_DIR), os.environ["PATH"]])
-    nox.options.default_venv_backend = "conda"
-elif shutil.which("mamba"):
+if shutil.which("mamba"):
     nox.options.default_venv_backend = "mamba"
 else:
     nox.options.default_venv_backend = "conda"
@@ -143,7 +133,7 @@ def mypy(session: nox.Session):
 
 @nox.session(python=PYTHONS)
 def tests(session: nox.Session):
-    session.conda_install("pytest", "hypothesis", "lark")
+    session.conda_install("pytest", "hypothesis", "lark", "maturin")
     session.env.update(ENV)
     try:
         session.run(