diff --git a/generators/GitHubActionsBuildEnv.py b/generators/GitHubActionsBuildEnv.py
index cfd5aed..d7b7305 100644
--- a/generators/GitHubActionsBuildEnv.py
+++ b/generators/GitHubActionsBuildEnv.py
@@ -22,8 +22,9 @@ class GitHubActionsBuildEnv(Generator):
 
     @property
     def content(self):
-        template = Template("""{% for k, v in envvars.items() %}echo "{{ k }}={{ v }}" >> $GITHUB_ENV\n{% endfor %}""")
+        template = Template("""{% for k, v in envvars.items() %}echo "{{ k }}={{ v }}" >> ${{ env_prefix }}GITHUB_ENV\n{% endfor %}""")
         build_env = VirtualBuildEnv(self.conanfile)
         env = build_env.environment()
         envvars = env.vars(self.conanfile, scope = "build")
-        return template.render(envvars = envvars)
+        env_prefix = "Env:" if self.conanfile.settings.os == "Windows" else ""
+        return template.render(envvars = envvars, env_prefix = env_prefix)
diff --git a/generators/GitHubActionsRunEnv.py b/generators/GitHubActionsRunEnv.py
index ad7b0e5..b79a130 100644
--- a/generators/GitHubActionsRunEnv.py
+++ b/generators/GitHubActionsRunEnv.py
@@ -22,8 +22,9 @@ class GitHubActionsRunEnv(Generator):
 
     @property
     def content(self):
-        template = Template("""{% for k, v in envvars.items() %}echo "{{ k }}={{ v }}" >> $GITHUB_ENV\n{% endfor %}""")
+        template = Template("""{% for k, v in envvars.items() %}echo "{{ k }}={{ v }}" >> ${{ env_prefix }}GITHUB_ENV\n{% endfor %}""")
         build_env = VirtualRunEnv(self.conanfile)
         env = build_env.environment()
         envvars = env.vars(self.conanfile, scope = "run")
-        return template.render(envvars = envvars)
+        env_prefix = "Env:" if self.conanfile.settings.os == "Windows" else ""
+        return template.render(envvars = envvars, env_prefix = env_prefix)
diff --git a/generators/VirtualPythonEnv.py b/generators/VirtualPythonEnv.py
index 99335c4..58ff3ff 100644
--- a/generators/VirtualPythonEnv.py
+++ b/generators/VirtualPythonEnv.py
@@ -142,7 +142,8 @@ class VirtualPythonEnv(Generator):
             activate_sh = Template(f.read()).render(envvars = envvars, prompt = self.conanfile.name)
 
         with open(Path(__file__).parent.joinpath("VirtualPythonEnvResources", "activate_github_actions_buildenv.jinja"), "r") as f:
-            activate_github_actions_buildenv = Template(f.read()).render(envvars = envvars, prompt = self.conanfile.name)
+            env_prefix = "Env:" if self.conanfile.settings.os == "Windows" else ""
+            activate_github_actions_buildenv = Template(f.read()).render(envvars = envvars, env_prefix = env_prefix)
 
         return {
             str(Path(self.conanfile.build_folder, self._venv_path, "activate.bat")): activate_bat,
diff --git a/generators/VirtualPythonEnvResources/activate_github_actions_buildenv.jinja b/generators/VirtualPythonEnvResources/activate_github_actions_buildenv.jinja
index cd04273..8150c31 100644
--- a/generators/VirtualPythonEnvResources/activate_github_actions_buildenv.jinja
+++ b/generators/VirtualPythonEnvResources/activate_github_actions_buildenv.jinja
@@ -1,2 +1,2 @@
-{% for var, value in envvars.items() %}echo "{{ var }}={{ value }}" >> $GITHUB_ENV
+{% for var, value in envvars.items() %}echo "{{ var }}={{ value }}" >> ${{ env_prefix }}GITHUB_ENV
 {% endfor %}