diff --git a/env.yaml b/env.yaml
deleted file mode 100644
index 22e2c9933..000000000
--- a/env.yaml
+++ /dev/null
@@ -1,22 +0,0 @@
-dependencies:
-  - conda-build
-  - python=3
-  - numpy 
-  - scipy 
-  - obspy 
-  - instaseis 
-  - pandas 
-  - xarray 
-  - netCDF4
-  - h5py 
-  - mpi4py
-  - retry
-  - flake8
-  - nose
-  - pytest
-  - pip
-  - pip:
-    - tables
-    - seisgen
-    - seishmc
-    - -e .
diff --git a/env.yaml b/env.yaml
new file mode 120000
index 000000000..1186a330b
--- /dev/null
+++ b/env.yaml
@@ -0,0 +1 @@
+env_default.yaml
\ No newline at end of file
diff --git a/env_arm64.yaml b/env_arm64.yaml
index 4abf532ff..24b11f2b3 100644
--- a/env_arm64.yaml
+++ b/env_arm64.yaml
@@ -1,10 +1,15 @@
+# for installation on ARM64 systems, including Apple M1 and Apple M2
+
+channels:
+  - defaults
+  - conda-forge
+
 dependencies:
   - conda-build
   - python=3
   - numpy 
   - scipy 
   - obspy 
-  #- instaseis 
   - pandas 
   - xarray 
   - netCDF4
@@ -16,7 +21,9 @@ dependencies:
   - pytest
   - pip
   - pip:
+    - git+https://github.com/sstaehler/instaseis.git
     - tables
     - seisgen
     - seishmc
     - -e .
+
diff --git a/env_default.yaml b/env_default.yaml
new file mode 100644
index 000000000..b6f4a7a7b
--- /dev/null
+++ b/env_default.yaml
@@ -0,0 +1,27 @@
+
+channels:
+  - defaults
+  - conda-forge
+
+dependencies:
+  - conda-build
+  - python=3
+  - numpy 
+  - scipy 
+  - obspy 
+  - instaseis 
+  - pandas 
+  - xarray 
+  - netCDF4
+  - h5py 
+  - mpi4py
+  - retry
+  - flake8
+  - nose
+  - pytest
+  - pip
+  - pip:
+    - tables
+    - seisgen
+    - seishmc
+    - -e .
diff --git a/setup.py b/setup.py
index fe1f6c8a2..d00b32be3 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,6 @@ def get_compile_args():
 
     else:
         compile_args += ['-Ofast']
-        compile_args += ['-march=native']
 
     return compile_args