diff --git a/news/6744.bugfix.rst b/news/6744.bugfix.rst
new file mode 100644
index 000000000..1cbb9055a
--- /dev/null
+++ b/news/6744.bugfix.rst
@@ -0,0 +1,3 @@
+Fix ``pipenv lock`` failing with ``Invalid requirement: 'colorama*'`` when a default package has markers that exclude the current platform,
+such as ``colorama = {version = "*", markers = "sys_platform == 'win32'"}``, and the Pipfile also has ``[dev-packages]``.
+The default section's locked ``"*"`` entry was turned into an invalid constraint for the develop resolution.
diff --git a/pipenv/utils/dependencies.py b/pipenv/utils/dependencies.py
index 6d6b4658f..06b678fd2 100644
--- a/pipenv/utils/dependencies.py
+++ b/pipenv/utils/dependencies.py
@@ -1574,7 +1574,9 @@ def get_constraints_from_resolved_deps(resolved_deps):
         if any(k in dep_info for k in ("path", "file", "git", "hg", "svn", "bzr")):
             continue
         version = dep_info.get("version")
-        if version:
+        # A package skipped by its markers is locked as "*": there is no pin
+        # to carry over, and "name*" is not a valid requirement.
+        if version and not is_star(version):
             canonical = canonicalize_name(dep_name)
             constraints.add(f"{canonical}{version}")
     return constraints
diff --git a/tests/unit/test_dependencies.py b/tests/unit/test_dependencies.py
index fdf41ef06..c33944be1 100644
--- a/tests/unit/test_dependencies.py
+++ b/tests/unit/test_dependencies.py
@@ -998,6 +998,21 @@ def test_empty_deps(self):
 
         assert get_constraints_from_resolved_deps({}) == set()
 
+    def test_skips_wildcard_versions(self):
+        """A package whose markers exclude the locking platform is locked as "*".
+
+        Writing it as ``colorama*`` made pip reject the constraints file, so
+        locking a dev category failed (``Invalid requirement: 'colorama*'``).
+        """
+        from pipenv.utils.dependencies import get_constraints_from_resolved_deps
+
+        resolved = {
+            "colorama": {"markers": "sys_platform == 'win32'", "version": "*"},
+            "normal": {"version": "==1.0"},
+        }
+        constraints = get_constraints_from_resolved_deps(resolved)
+        assert constraints == {"normal==1.0"}
+
     def test_canonicalizes_names(self):
         from pipenv.utils.dependencies import get_constraints_from_resolved_deps