diff --git a/src/cmd/cov/Makefile b/src/cmd/cov/Makefile
--- a/src/cmd/cov/Makefile
+++ b/src/cmd/cov/Makefile
@@ -25,6 +25,7 @@
 install: install-$(shell uname | tr A-Z a-z)
 install-linux: install-default
 install-freebsd: install-default
+install-netbsd: install-default
 
 # on Darwin, have to install and setgid; see $GOROOT/src/sudo.bash
 install-darwin: $(TARG)
diff --git a/src/cmd/prof/Makefile b/src/cmd/prof/Makefile
--- a/src/cmd/prof/Makefile
+++ b/src/cmd/prof/Makefile
@@ -25,6 +25,7 @@
 install: install-$(shell uname | tr A-Z a-z)
 install-linux: install-default
 install-freebsd: install-default
+install-netbsd: install-default
 
 # on Darwin, have to install and setgid; see $GOROOT/src/sudo.bash
 install-darwin: $(TARG)
diff --git a/src/make.bash b/src/make.bash
--- a/src/make.bash
+++ b/src/make.bash
@@ -39,10 +39,10 @@
 esac
 
 case "$GOOS" in
-darwin | freebsd | linux | mingw | nacl)
+darwin | freebsd | linux | mingw | nacl | netbsd)
 	;;
 *)
-	echo '$GOOS is set to <'$GOOS'>, must be darwin, freebsd, linux, mingw, or nacl' 1>&2
+	echo '$GOOS is set to <'$GOOS'>, must be darwin, freebsd, linux, mingw, nacl, or netbsd' 1>&2
 	exit 1
 esac