diff --git a/main/cmd/install/install.h b/include/depgraph.h
similarity index 62%
rename from main/cmd/install/install.h
rename to include/depgraph.h
index d27145c..7a2d1c8 100644
--- a/main/cmd/install/install.h
+++ b/include/depgraph.h
@@ -1,28 +1,6 @@
 /* SPDX-License-Identifier: ISC */
-#ifndef INSTALL_H
-#define INSTALL_H
-
-#include <stdbool.h>
-#include <getopt.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdio.h>
-#include <fcntl.h>
-
-#include "util/util.h"
-
-#include "filelist/image_entry.h"
-
-#include "pkgreader.h"
-#include "command.h"
-#include "pkgio.h"
-
-enum {
-	INSTALL_MODE_INSTALL = 0,
-	INSTALL_MODE_LIST_PKG,
-	INSTALL_MODE_LIST_FILES,
-};
+#ifndef DEPGRAPH_H
+#define DEPGRAPH_H
 
 struct pkg_dep_node {
 	char *name;
@@ -52,4 +30,4 @@ int collect_dependencies(int repofd, struct pkg_dep_list *list);
 
 int sort_by_dependencies(struct pkg_dep_list *list);
 
-#endif /* INSTALL_H */
+#endif /* DEPGRAPH_H */
diff --git a/main/Makemodule.am b/main/Makemodule.am
index be62c48..ca4f149 100644
--- a/main/Makemodule.am
+++ b/main/Makemodule.am
@@ -1,7 +1,11 @@
 pkg_SOURCES = include/pkgformat.h include/pkgreader.h include/pkgio.h
 pkg_SOURCES += include/compressor.h include/command.h include/pkgwriter.h
+pkg_SOURCES += include/depgraph.h
 pkg_SOURCES += main/pkg.c main/compressor.c main/command.c main/pkgreader.c
 pkg_SOURCES += main/pkgwriter.c main/pkgio_rd_image_entry.c main/pkg_unpack.c
+pkg_SOURCES += main/depgraph/collect.c main/depgraph/pkglist.c
+pkg_SOURCES += main/depgraph/tsort.c
+
 pkg_CFLAGS = $(AM_CFLAGS)
 pkg_LDADD = libutil.a libfilelist.a
 
@@ -18,9 +22,7 @@ pkg_SOURCES += main/cmd/dump/dump.c main/cmd/dump/dump.h
 pkg_SOURCES += main/cmd/dump/dump_header.c
 
 # install command
-pkg_SOURCES += main/cmd/install/collect.c main/cmd/install/install.c
-pkg_SOURCES += main/cmd/install/install.h main/cmd/install/pkglist.c
-pkg_SOURCES += main/cmd/install/tsort.c
+pkg_SOURCES += main/cmd/install.c
 
 # buildstrategy command
 pkg_SOURCES += main/cmd/buildstrategy/buildstrategy.h
diff --git a/main/cmd/install/install.c b/main/cmd/install.c
similarity index 95%
rename from main/cmd/install/install.c
rename to main/cmd/install.c
index 39f34b7..23ab976 100644
--- a/main/cmd/install/install.c
+++ b/main/cmd/install.c
@@ -1,5 +1,22 @@
 /* SPDX-License-Identifier: ISC */
-#include "install.h"
+#include <stdbool.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#include "util/util.h"
+#include "depgraph.h"
+#include "command.h"
+#include "pkgio.h"
+
+enum {
+	INSTALL_MODE_INSTALL = 0,
+	INSTALL_MODE_LIST_PKG,
+	INSTALL_MODE_LIST_FILES,
+};
 
 static const struct option long_opts[] = {
 	{ "root", required_argument, NULL, 'r' },
diff --git a/main/cmd/install/collect.c b/main/depgraph/collect.c
similarity index 93%
rename from main/cmd/install/collect.c
rename to main/depgraph/collect.c
index 2570976..60a0a47 100644
--- a/main/cmd/install/collect.c
+++ b/main/depgraph/collect.c
@@ -1,5 +1,10 @@
 /* SPDX-License-Identifier: ISC */
-#include "install.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "pkgreader.h"
+#include "depgraph.h"
 
 int collect_dependencies(int repofd, struct pkg_dep_list *list)
 {
diff --git a/main/cmd/install/pkglist.c b/main/depgraph/pkglist.c
similarity index 91%
rename from main/cmd/install/pkglist.c
rename to main/depgraph/pkglist.c
index 78f9726..71c7823 100644
--- a/main/cmd/install/pkglist.c
+++ b/main/depgraph/pkglist.c
@@ -1,5 +1,9 @@
 /* SPDX-License-Identifier: ISC */
-#include "install.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "depgraph.h"
 
 struct pkg_dep_node *append_pkg(struct pkg_dep_list *list, const char *name)
 {
diff --git a/main/cmd/install/tsort.c b/main/depgraph/tsort.c
similarity index 95%
rename from main/cmd/install/tsort.c
rename to main/depgraph/tsort.c
index 599c21b..0c8d428 100644
--- a/main/cmd/install/tsort.c
+++ b/main/depgraph/tsort.c
@@ -1,5 +1,8 @@
 /* SPDX-License-Identifier: ISC */
-#include "install.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "depgraph.h"
 
 static void remove_dependency(struct pkg_dep_list *list,
 			      struct pkg_dep_node *pkg)