Index: lldb/source/Host/common/HostInfoBase.cpp
===================================================================
--- lldb/source/Host/common/HostInfoBase.cpp
+++ lldb/source/Host/common/HostInfoBase.cpp
@@ -209,7 +209,8 @@
     normalized_triple.setVendor(host_triple.getVendor());
   if (normalized_triple.getOSName().empty())
     normalized_triple.setOS(host_triple.getOS());
-  if (normalized_triple.getEnvironmentName().empty())
+  if (normalized_triple.getEnvironmentName().empty() &&
+      !host_triple.getEnvironmentName().empty())
     normalized_triple.setEnvironment(host_triple.getEnvironment());
   return ArchSpec(normalized_triple);
 }
Index: lldb/unittests/Host/HostInfoTest.cpp
===================================================================
--- lldb/unittests/Host/HostInfoTest.cpp
+++ lldb/unittests/Host/HostInfoTest.cpp
@@ -43,6 +43,9 @@
   // Test LLDB_ARCH_DEFAULT
   EXPECT_EQ(HostInfo::GetAugmentedArchSpec(LLDB_ARCH_DEFAULT).GetTriple(),
             HostInfo::GetArchitecture(HostInfo::eArchKindDefault).GetTriple());
+  EXPECT_NE(
+      HostInfo::GetAugmentedArchSpec("armv7k").GetTriple().getEnvironmentName(),
+      "unknown");
 }
 
 TEST_F(HostInfoTest, GetHostname) {