diff --git a/share/man/man7/build.7 b/share/man/man7/build.7
index dfa424ebbb86..9171813a0e06 100644
--- a/share/man/man7/build.7
+++ b/share/man/man7/build.7
@@ -94,39 +94,10 @@ Rebuild the kernel and the kernel modules.
 Install the kernel and the kernel modules.
 .It Cm reinstallkernel
 Reinstall the kernel and the kernel modules.
-.It Cm upgrade
-Upgrade
-.Xr a.out 5
-(2.2.x/3.0) system to the new
-.Xr elf 5
-way.
 .It Cm most
 Build user commands, no libraries or include files.
 .It Cm installmost
 Install user commands, no libraries or include files.
-.It Cm aout-to-elf
-Upgrade a system from
-.Xr a.out 5
-to
-.Xr elf 5
-format.
-.It Cm aout-to-elf-build
-Build everything required to upgrade a system from
-.Xr a.out 5
-to
-.Xr elf 5
-format.
-.It Cm aout-to-elf-install
-Install everything built by
-.Cm aout-to-elf-build .
-.It Cm move-aout-libs
-Move the
-.Xr a.out 5
-libraries into an
-.Pa aout
-subdirectory of each
-.Xr elf 5
-library subdirectory.
 .El
 .Pp
 For more information about the ports build process, see