diff --git a/.github/workflows/binary-applications.yml b/.github/workflows/binary-applications.yml
index 68b9bce99..f1ab364b8 100644
--- a/.github/workflows/binary-applications.yml
+++ b/.github/workflows/binary-applications.yml
@@ -201,19 +201,17 @@ jobs:
             - name: Build conda env with python dependencies
               shell: bash -l {0}
               run: |
-                  conda upgrade -y pip setuptools
-                  conda install toml requests nomkl
-                  conda install $(python -c "import toml;print(' '.join(toml.load('pyproject.toml')['build-system']['requires']))")
+                  conda install nomkl
+                  
                   python ./scripts/convert-requirements-to-conda-yml.py \
                         requirements.txt \
                         requirements-dev.txt \
                         requirements-gui.txt > requirements-all.yml
                   conda env update --file requirements-all.yml
 
-                  # Libtiff from conda defaults channel gets around issue with missing libwebp
-                  conda install --yes libtiff
                   conda list
 
+
             - name: Build binaries
               shell: bash -l {0}
               run: |
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 58961ca85..f4d9e5acd 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -17,7 +17,7 @@ wheel>=0.27.0
 setuptools>=8.0
 Sphinx>=1.3.1,!=1.7.1
 sphinx-rtd-theme
-PyInstaller==3.5
+PyInstaller==3.5 # pip-only
 setuptools_scm
 requests
 coverage
diff --git a/requirements-gui.txt b/requirements-gui.txt
index c00d85701..de041e85d 100644
--- a/requirements-gui.txt
+++ b/requirements-gui.txt
@@ -7,7 +7,7 @@
 # finding the cocoa plugin interface. And in general the pip distributions
 # seem better supported by PyInstaller
 
-qtpy>1.3
-qtawesome
+qtpy>1.3  # pip-only
+qtawesome  # pip-only
 requests
-PySide2!=5.15.0 
+PySide2!=5.15.0  # pip-only