diff --git a/Makefile b/Makefile
index f78a1b040c15..deee4e46f558 100644
--- a/Makefile
+++ b/Makefile
@@ -89,7 +89,7 @@
 #
 # See src/UPDATING `COMMON ITEMS' for more complete information.
 #
-# If TARGET=machine (e.g. powerpc, sparc64, ...) is specified you can
+# If TARGET=machine (e.g. powerpc, arm64, ...) is specified you can
 # cross build world for other machine types using the buildworld target,
 # and once the world is built you can cross build a kernel using the
 # buildkernel target.
@@ -488,7 +488,7 @@ worlds: .PHONY
 # In all cases, if the user specifies TARGETS on the command line,
 # honor that most of all.
 #
-TARGETS?=amd64 arm arm64 i386 mips powerpc riscv sparc64
+TARGETS?=amd64 arm arm64 i386 mips powerpc riscv
 _UNIVERSE_TARGETS=	${TARGETS}
 TARGET_ARCHES_arm?=	armv6 armv7
 TARGET_ARCHES_arm64?=	aarch64
@@ -501,14 +501,12 @@ TARGET_ARCHES_${target}?= ${target}
 .endfor
 
 MAKE_PARAMS_mips?=	CROSS_TOOLCHAIN=mips-gcc6
-MAKE_PARAMS_sparc64?=	CROSS_TOOLCHAIN=sparc64-gcc6
 
 TOOLCHAINS_mips=	mips-gcc6
-TOOLCHAINS_sparc64=	sparc64-gcc6
 
 # Remove architectures only supported by external toolchain from
 # universe if required toolchain packages are missing.
-.for target in mips sparc64
+.for target in mips
 .if ${_UNIVERSE_TARGETS:M${target}}
 .for toolchain in ${TOOLCHAINS_${target}}
 .if !exists(/usr/local/share/toolchains/${toolchain}.mk)
diff --git a/Makefile.inc1 b/Makefile.inc1
index ff195bdc1295..5433eb958204 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -153,8 +153,7 @@ KNOWN_ARCHES?=	aarch64/arm64 \
 		powerpc64/powerpc \
 		powerpcspe/powerpc \
 		riscv64/riscv \
-		riscv64sf/riscv \
-		sparc64
+		riscv64sf/riscv
 
 .if ${TARGET} == ${TARGET_ARCH}
 _t=		${TARGET}
@@ -2290,8 +2289,6 @@ _basic_bootstrap_tools_multilink+=bin/test test,[
 _basic_bootstrap_tools=usr.bin/awk usr.bin/cut bin/expr usr.bin/gencat \
     usr.bin/join usr.bin/mktemp bin/rmdir usr.bin/sed usr.bin/sort \
     usr.bin/truncate usr.bin/tsort
-# elf2aout is required for sparc64 build
-_basic_bootstrap_tools+=usr.bin/elf2aout
 # file2c is required for building usr.sbin/config:
 _basic_bootstrap_tools+=usr.bin/file2c
 # uuencode/uudecode required for share/tabset
@@ -2915,14 +2912,10 @@ _cddl_lib_libctf= cddl/lib/libctf
 _cddl_lib= cddl/lib
 cddl/lib/libctf__L: lib/libz__L
 .endif
-# cddl/lib/libdtrace requires lib/libproc and lib/librtld_db; it's only built
-# on select architectures though (see cddl/lib/Makefile)
-.if ${MACHINE_CPUARCH} != "sparc64"
 _prebuild_libs+=	lib/libprocstat lib/libproc lib/librtld_db
 lib/libprocstat__L: lib/libelf__L lib/libkvm__L lib/libutil__L
 lib/libproc__L: lib/libprocstat__L
 lib/librtld_db__L: lib/libprocstat__L
-.endif
 
 .if ${MK_CRYPT} != "no"
 .if ${MK_OPENSSL} != "no"