diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index 11311f9..285f156 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -205,6 +205,9 @@
 		"CCACHE_SLOPPINESS",
 		"CCACHE_BASEDIR",
 		"CCACHE_CPP2",
+
+		// LLVM compiler wrapper options
+		"TOOLCHAIN_RUSAGE_OUTPUT",
 	}
 
 	allVars := append(append([]string{
diff --git a/ui/build/ninja.go b/ui/build/ninja.go
index 41de6bd..dab1a9b 100644
--- a/ui/build/ninja.go
+++ b/ui/build/ninja.go
@@ -169,6 +169,9 @@
 			"CCACHE_BASEDIR",
 			"CCACHE_CPP2",
 			"CCACHE_DIR",
+
+			// LLVM compiler wrapper options
+			"TOOLCHAIN_RUSAGE_OUTPUT",
 		}, config.BuildBrokenNinjaUsesEnvVars()...)...)
 	}