diff --git a/Dockerfile b/Dockerfile
index 2b939ee..c4aeca9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,8 @@ USER pims
 # Set up the initial conda environment
 COPY --chown=pims:pims environment.yml /src/environment.yml
 WORKDIR /src
+RUN conda config --prepend envs_dirs $HOME/.conda/envs
+RUN conda config --prepend pkgs_dirs $HOME/.conda/pkgs
 RUN conda env create -f environment.yml \
     && conda clean -tipsy
 
diff --git a/pims/bioformats.py b/pims/bioformats.py
index 95d21dc..05553b1 100644
--- a/pims/bioformats.py
+++ b/pims/bioformats.py
@@ -361,7 +361,11 @@ def __init__(self, filename, meta=True, java_memory='512m',
         # patch for issue with ND2 files and the Chunkmap implemented in 5.4.0
         # See https://github.com/openmicroscopy/bioformats/issues/2955
         # circumventing the reserved keyword 'in'
-        mo = getattr(loci.formats, 'in').DynamicMetadataOptions()
+        try:
+            mo = getattr(loci.formats, 'in').DynamicMetadataOptions()
+        except AttributeError:
+            # Attribute name conflict causes mangling of `in` to `in_`
+            mo = getattr(loci.formats, 'in_').DynamicMetadataOptions()
         mo.set('nativend2.chunkmap', 'False')  # Format Bool as String
         self.rdr.setMetadataOptions(mo)
 
diff --git a/pims/imageio_reader.py b/pims/imageio_reader.py
index 4d58f0f..15bdfd8 100644
--- a/pims/imageio_reader.py
+++ b/pims/imageio_reader.py
@@ -13,6 +13,10 @@
     imageio = None
 try:
     import imageio_ffmpeg
+    try:
+        imageio_ffmpeg.get_ffmpeg_exe()
+    except RuntimeError:
+        imageio_ffmpeg = None
 except ImportError:
     imageio_ffmpeg = None