diff --git a/src/rezplugins/shell/_utils/powershell_base.py b/src/rezplugins/shell/_utils/powershell_base.py
index 18759d102..62cb27516 100644
--- a/src/rezplugins/shell/_utils/powershell_base.py
+++ b/src/rezplugins/shell/_utils/powershell_base.py
@@ -256,6 +256,9 @@ def shebang(self):
 
     def setenv(self, key, value):
         value = self.escape_string(value, is_path=self._is_pathed_key(key))
+        if platform_.name == "windows" and key == "CMAKE_MODULE_PATH":
+            # Fix CMake build in Windows for `CMAKE_MODULE_PATH` force to use "/"
+            value = value.replace("\\", "/")
         self._addline('Set-Item -Path "Env:{0}" -Value "{1}"'.format(key, value))
 
     def prependenv(self, key, value):
diff --git a/src/rezplugins/shell/cmd.py b/src/rezplugins/shell/cmd.py
index c3afdcc01..5cd121a95 100644
--- a/src/rezplugins/shell/cmd.py
+++ b/src/rezplugins/shell/cmd.py
@@ -255,6 +255,9 @@ def shebang(self):
 
     def setenv(self, key, value):
         value = self.escape_string(value, is_path=self._is_pathed_key(key))
+        if key == "CMAKE_MODULE_PATH":
+            # Fix CMake build in Windows for `CMAKE_MODULE_PATH` force to use "/"
+            value = value.replace("\\", "/")
         self._addline('set %s=%s' % (key, value))
 
     def unsetenv(self, key):