Index: head/share/man/man7/build.7
===================================================================
--- head/share/man/man7/build.7
+++ head/share/man/man7/build.7
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 14, 2016
+.Dd April 28, 2016
 .Dt BUILD 7
 .Os
 .Sh NAME
@@ -195,6 +195,12 @@
 .Pa etc ,
 and
 .Pa release .
+The object directory can be changed from the default
+.Pa /usr/obj
+by setting the
+.Pa MAKEOBJDIRPREFIX
+.Xr make 1
+variable.
 The actual build location prefix used is
 .Pa ${MAKEOBJDIRPREFIX}${.CURDIR}
 for native builds, and
@@ -278,6 +284,12 @@
 .Bl -tag -width ".Cm distributekernel"
 .It Cm buildkernel
 Rebuild the kernel and the kernel modules.
+The object directory can be changed from the default
+.Pa /usr/obj
+by setting the
+.Pa MAKEOBJDIRPREFIX
+.Xr make 1
+variable.
 .It Cm installkernel
 Install the kernel and the kernel modules to directory
 .Pa ${DESTDIR}/boot/kernel ,
@@ -347,7 +359,7 @@
 .Dq Li "make installworld" .
 .It Cm delete-old-libs
 Delete obsolete base system libraries interactively.
-This target should only be used if no 3rd party software uses these
+This target should only be used if no third party software uses these
 libraries.
 When
 .Li -DBATCH_DELETE_OLD_FILES
@@ -560,7 +572,7 @@
 .It Va NO_SHARE
 If set, the build does not descend into the
 .Pa /usr/src/share
-subdirectory (i.e., manpages, locale data files, timezone data files and
+subdirectory (i.e., manual pages, locale data files, timezone data files and
 other
 .Pa /usr/src/share
 files will not be rebuild from their sources).