diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1d3f231df..27544258d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -39,10 +39,6 @@ jobs:
       matrix:
         include:
           # UBUNTU
-          - os: ubuntu-latest
-            python-version: "3.8"
-            conda-standalone: conda-standalone
-            check-docs: true
           - os: ubuntu-latest
             python-version: "3.9"
             conda-standalone: conda-standalone
@@ -58,12 +54,9 @@ jobs:
             conda-standalone: conda-standalone
           # MACOS
           - os: macos-13
-            python-version: "3.8"
+            python-version: "3.9"
             conda-standalone: conda-standalone-nightly
-          # Not running for 3.9, 3.10 to save some CI resources
-          # - os: macos
-          #   python-version: "3.9"
-          #   conda-standalone: conda-standalone
+          # Not running for 3.10 to save some CI resources
           # - os: macos-13
           #   python-version: "3.10"
           #   conda-standalone: micromamba
@@ -74,9 +67,6 @@ jobs:
             python-version: "3.12"
             conda-standalone: micromamba
           # WINDOWS
-          - os: windows-latest
-            python-version: "3.8"
-            conda-standalone: conda-standalone
           - os: windows-latest
             python-version: "3.9"
             conda-standalone: conda-standalone-nightly
@@ -132,6 +122,12 @@ jobs:
             conda activate constructor-dev
             echo "CONSTRUCTOR_CONDA_EXE=$CONDA_PREFIX/standalone_conda/conda.exe" >> $GITHUB_ENV
           fi
+      - name: conda info
+        run: conda info
+      - name: conda list
+        run: conda list
+      - name: conda config
+        run: conda config --show-sources
       - name: Run unit tests
         run: |
           pytest -vv --cov=constructor --cov-branch tests/ -m "not examples"
diff --git a/constructor/utils.py b/constructor/utils.py
index 730ea47e3..4b2c6352a 100644
--- a/constructor/utils.py
+++ b/constructor/utils.py
@@ -178,14 +178,35 @@ def ensure_transmuted_ext(info, url):
 
 def get_final_url(info, url):
     mapping = info.get('channels_remap', [])
+    if not url.lower().endswith((".tar.bz2", ".conda", "/")):
+        url += "/"
+        added_slash = True
+    else:
+        added_slash = False
     for entry in mapping:
         src = entry['src']
         dst = entry['dest']
-        if url.startswith(src):
-            new_url = url.replace(src, dst)
+        # Treat http:// and https:// as equivalent
+        if src.startswith("http"):
+            srcs = tuple(
+                dict.fromkeys(
+                    [
+                        src.replace("http://", "https://"),
+                        src.replace("https://", "http://")
+                    ]
+                )
+            )
+        else:
+            srcs = (src,)
+        if url.startswith(srcs):
+            new_url = url
+            for src in srcs:
+                new_url = new_url.replace(src, dst)
             if url.endswith(".tar.bz2"):
                 logger.warning("You need to make the package %s available "
                                "at %s", url.rsplit('/', 1)[1], new_url)
+            if added_slash:
+                new_url = new_url[:-1]
             return new_url
     return url
 
diff --git a/examples/regressions/construct.yaml b/examples/regressions/construct.yaml
new file mode 100644
index 000000000..ceda1fd05
--- /dev/null
+++ b/examples/regressions/construct.yaml
@@ -0,0 +1,17 @@
+name: regressions
+
+version: 0.0.1
+
+keep_pkgs: True
+
+channels:
+  - conda-forge
+
+specs:
+  - x264  # check https://github.com/conda/constructor/issues/908
+
+initialize_by_default: false
+register_python: false
+check_path_spaces: false
+check_path_length: false
+installer_type: all
diff --git a/news/909-cls-compat b/news/909-cls-compat
new file mode 100644
index 000000000..832510317
--- /dev/null
+++ b/news/909-cls-compat
@@ -0,0 +1,20 @@
+### Enhancements
+
+* <news item>
+
+### Bug fixes
+
+* `channels_remap` is now insensitive to `http` vs `https`, and trailing slashes. (#909)
+* Add a regression test for packages including percent-encodable characters in their filenames. (#908 via #909)
+
+### Deprecations
+
+* <news item>
+
+### Docs
+
+* <news item>
+
+### Other
+
+* Do not run CI against Python 3.8. (#909)
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index e89e93a27..1fda791f2 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -28,6 +28,7 @@ requirements:
     - nsis >=3.08      # [win]
   run_constrained:     # [unix]
     - nsis >=3.08      # [unix]
+    - conda-libmamba-solver !=24.11.0
 
 test:
   source_files:
diff --git a/tests/test_examples.py b/tests/test_examples.py
index 0fd099a19..c0a744783 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -911,3 +911,16 @@ def test_ignore_condarc_files(tmp_path, monkeypatch, request):
             # the bogus .condarc file.
             # pkg installers unfortunately do not output any errors into the log.
             assert proc.stderr.count("Bad conversion of configurable") == 4
+
+
+def test_regressions(tmp_path, request):
+    input_path = _example_path("regressions")
+    for installer, install_dir in create_installer(input_path, tmp_path):
+        _run_installer(
+            input_path,
+            installer,
+            install_dir,
+            request=request,
+            check_subprocess=True,
+            uninstall=True,
+        )