This installs gotadmin in the -portable version. Tested on Ubuntu 20.04.

ok?

diff --git a/.gitignore b/.gitignore
index c7b0475d..46c63ad1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ configure
 core
 etc/
 got/got
+gotadmin/gotadmin
 lib/.dirstamp
 libexec/got-fetch-pack/got-fetch-pack
 libexec/got-index-pack/got-index-pack
diff --git a/Makefile.am b/Makefile.am
index 0d93efe9..b8c13f98 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = compat libexec got tog
+SUBDIRS = compat libexec got tog gotadmin
 
 #dist_EXTRA_got_SOURCES = compat/*.[ch]
 
diff --git a/configure.ac b/configure.ac
index d46408ad..4fb5a289 100644
--- a/configure.ac
+++ b/configure.ac
@@ -394,6 +394,7 @@ AC_CONFIG_FILES([Makefile
 		 libexec/got-read-pack/Makefile
 		 libexec/got-read-tag/Makefile
 		 got/Makefile
+		 gotadmin/Makefile
 		 tog/Makefile])
 AC_OUTPUT
 
diff --git a/gotadmin/Makefile b/gotadmin/Makefile
deleted file mode 100644
index fa31072b..00000000
--- a/gotadmin/Makefile
+++ /dev/null
@@ -1,35 +0,0 @@
-.PATH:${.CURDIR}/../lib
-
-.include "../got-version.mk"
-
-PROG=		gotadmin
-SRCS=		gotadmin.c \
-		deflate.c delta.c delta_cache.c deltify.c error.c gotconfig.c \
-		inflate.c lockfile.c object.c object_cache.c object_create.c \
-		object_idset.c object_parse.c opentemp.c pack.c pack_create.c \
-		path.c privsep.c reference.c repository.c repository_admin.c \
-		sha1.c
-MAN =		${PROG}.1
-
-CPPFLAGS = -I${.CURDIR}/../include -I${.CURDIR}/../lib
-
-.if defined(PROFILE)
-LDADD = -lutil_p -lz_p -lc_p
-.else
-LDADD = -lutil -lz
-.endif
-DPADD = ${LIBZ} ${LIBUTIL}
-
-.if ${GOT_RELEASE} != "Yes"
-NOMAN = Yes
-.endif
-
-realinstall:
-	${INSTALL} ${INSTALL_COPY} -o ${BINOWN} -g ${BINGRP} \
-	-m ${BINMODE} ${PROG} ${BINDIR}/${PROG}
-
-dist:
-	mkdir ../got-${GOT_VERSION}/${PROG}
-	cp ${SRCS} ${MAN} ../got-${GOT_VERSION}/${PROG}
-
-.include <bsd.prog.mk>
diff --git a/gotadmin/Makefile.am b/gotadmin/Makefile.am
new file mode 100644
index 00000000..867526de
--- /dev/null
+++ b/gotadmin/Makefile.am
@@ -0,0 +1,40 @@
+bin_PROGRAMS = gotadmin
+
+gotadmin_SOURCES = gotadmin.c \
+	$(top_srcdir)/lib/deflate.c \
+	$(top_srcdir)/lib/delta.c \
+	$(top_srcdir)/lib/delta_cache.c \
+	$(top_srcdir)/lib/deltify.c \
+	$(top_srcdir)/lib/error.c \
+	$(top_srcdir)/lib/gotconfig.c \
+	$(top_srcdir)/lib/inflate.c \
+	$(top_srcdir)/lib/lockfile.c \
+	$(top_srcdir)/lib/object.c \
+	$(top_srcdir)/lib/object_cache.c \
+	$(top_srcdir)/lib/object_create.c \
+	$(top_srcdir)/lib/object_idset.c \
+	$(top_srcdir)/lib/object_parse.c \
+	$(top_srcdir)/lib/opentemp.c \
+	$(top_srcdir)/lib/pack.c \
+	$(top_srcdir)/lib/pack_create.c \
+	$(top_srcdir)/lib/path.c \
+	$(top_srcdir)/lib/privsep.c \
+	$(top_srcdir)/lib/reference.c \
+	$(top_srcdir)/lib/repository.c \
+	$(top_srcdir)/lib/repository_admin.c \
+	$(top_srcdir)/lib/sha1.c
+
+gotadmin_DEPENDENCIES = $(top_builddir)/compat/libopenbsd-compat.a
+
+man1_MANS = gotadmin.1
+
+AM_CPPFLAGS += -DGOT_VERSION='"@VERSION@"' \
+	-DGOT_VERSION_NUMBER='"@VERSION@"' \
+	-DGOT_LIBEXECDIR="${bindir}" \
+	-I$(top_srcdir) \
+	-I$(top_srcdir)/compat \
+	-I$(top_srcdir)/lib \
+	-I$(top_srcdir)/include \
+	-I.
+
+LDADD = -L$(top_builddir)/compat -lopenbsd-compat
diff --git a/gotadmin/gotadmin.c b/gotadmin/gotadmin.c
index a6398ccb..2cd34eb4 100644
--- a/gotadmin/gotadmin.c
+++ b/gotadmin/gotadmin.c
@@ -14,7 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/queue.h>
 #include <sys/types.h>
 
 #include <ctype.h>
@@ -29,7 +28,8 @@
 #include <signal.h>
 #include <string.h>
 #include <unistd.h>
-#include <util.h>
+
+#include "got_compat.h"
 
 #include "got_version.h"
 #include "got_error.h"