diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..38a6b98
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/duperemove-0.11.tar.gz
diff --git a/duperemove-use-system-xxhash.patch b/duperemove-use-system-xxhash.patch
new file mode 100644
index 0000000..0298fa3
--- /dev/null
+++ b/duperemove-use-system-xxhash.patch
@@ -0,0 +1,77 @@
+diff -urb duperemove-0.11a/csum-xxhash.c duperemove-0.11b/csum-xxhash.c
+--- duperemove-0.11a/csum-xxhash.c	2018-05-15 20:47:26.000000000 +0100
++++ duperemove-0.11b/csum-xxhash.c	2018-09-10 11:11:17.768921930 +0100
+@@ -43,7 +43,7 @@
+ }
+ 
+ struct xxhash_running_checksum {
+-	XXH64_state_t	td64;
++	XXH64_state_t	*td64;
+ };
+ DECLARE_RUNNING_CSUM_CAST_FUNCS(xxhash_running_checksum);
+ 
+@@ -51,7 +51,8 @@
+ {
+ 	struct xxhash_running_checksum *c =
+ 		calloc(1, sizeof(struct xxhash_running_checksum));
+-	XXH64_reset(&c->td64, 0);
++	c->td64 = XXH64_createState();
++	XXH64_reset(c->td64, 0);
+ 	return priv_to_rc(c);
+ }
+ 
+@@ -59,7 +60,7 @@
+ 					   unsigned int len, unsigned char *buf)
+ {
+ 	struct xxhash_running_checksum *c = rc_to_priv(_c);
+-	XXH64_update(&c->td64, buf, len);
++	XXH64_update(c->td64, buf, len);
+ }
+ 
+ static void xxhash_finish_running_checksum(struct running_checksum *_c,
+@@ -68,7 +69,8 @@
+ 	struct xxhash_running_checksum *c = rc_to_priv(_c);
+ 	unsigned long long *hash = (unsigned long long*)digest;
+ 
+-	*hash = XXH64_digest(&c->td64);
++	*hash = XXH64_digest(c->td64);
++	XXH64_freeState(c->td64);
+ 	free(c);
+ }
+ 
+diff -urb duperemove-0.11a/Makefile duperemove-0.11b/Makefile
+--- duperemove-0.11a/Makefile	2018-05-15 20:47:26.000000000 +0100
++++ duperemove-0.11b/Makefile	2018-09-10 11:09:11.808519081 +0100
+@@ -8,13 +8,13 @@
+ 
+ HEADERS=csum.h hash-tree.h results-tree.h kernel.h list.h rbtree.h dedupe.h \
+ 	btrfs-ioctl.h filerec.h btrfs-util.h debug.h util.h \
+-	memstats.h file_scan.h find_dupes.h run_dedupe.h xxhash.h \
++	memstats.h file_scan.h find_dupes.h run_dedupe.h \
+ 	bswap.h dbfile.h interval_tree.h interval_tree_generic.h \
+ 	rbtree_augmented.h list_sort.h stats.h
+ CFILES=duperemove.c hash-tree.c results-tree.c rbtree.c dedupe.c filerec.c \
+ 	btrfs-util.c util.c memstats.c file_scan.c find_dupes.c run_dedupe.c \
+ 	csum.c dbfile.c interval_tree.c list_sort.c stats.c debug.c
+-hash_CFILES=csum-xxhash.c xxhash.c csum-murmur3.c
++hash_CFILES=csum-xxhash.c csum-murmur3.c
+ 
+ CFILES += $(hash_CFILES)
+ 
+@@ -24,7 +24,7 @@
+ 
+ DIST_CFILES:=$(CFILES) $(hashstats_CFILES) $(btrfs_extent_same_CFILES) \
+ 	$(csum_test_CFILES)
+-DIST_SOURCES:=$(DIST_CFILES) $(HEADERS) LICENSE LICENSE.xxhash Makefile \
++DIST_SOURCES:=$(DIST_CFILES) $(HEADERS) LICENSE Makefile \
+ 	rbtree.txt README.md $(MANPAGES) SubmittingPatches docs/duperemove.html
+ DIST=duperemove-$(VER)
+ DIST_TARBALL=$(RELEASE).tar.gz
+@@ -45,6 +45,7 @@
+ glib_LIBS=$(shell pkg-config --libs glib-2.0)
+ sqlite_CFLAGS=$(shell pkg-config --cflags sqlite3)
+ sqlite_LIBS=$(shell pkg-config --libs sqlite3)
++hash_LIBS=-lxxhash
+ 
+ ifdef DEBUG
+ 	DEBUG_FLAGS = -ggdb3 -fsanitize=address -fno-omit-frame-pointer	\
diff --git a/duperemove.spec b/duperemove.spec
new file mode 100644
index 0000000..3b9ea70
--- /dev/null
+++ b/duperemove.spec
@@ -0,0 +1,65 @@
+Name:           duperemove
+Version:        0.11
+Release:        2%{?dist}
+Summary:        Tools for deduping file systems
+License:        GPLv2
+URL:            https://github.com/markfasheh/%{name}
+Source0:        %{url}/archive/v%{version}/%{name}-%{version}.tar.gz
+Patch1:         duperemove-use-system-xxhash.patch
+BuildRequires:  pkgconfig(glib-2.0)
+BuildRequires:  pkgconfig(sqlite3)
+BuildRequires:  libgcrypt-devel
+BuildRequires:  xxhash-devel
+BuildRequires:  libatomic
+BuildRequires:  gcc
+
+%description
+Duperemove is a simple tool for finding duplicated extents and
+submitting them for deduplication. When given a list of files it will
+hash their contents on a block by block basis and compare those hashes
+to each other, finding and categorizing extents that match each other.
+
+When given the -d option, duperemove will submit those extents for
+deduplication using the btrfs-extent-same ioctl.
+
+%prep
+%autosetup
+rm -f xxhash.c xxhash.h
+
+%build
+%set_build_flags
+%make_build
+
+%install
+%make_install SBINDIR=%{_sbindir} MANDIR=%{_mandir}
+
+%files
+%doc README.md
+%license LICENSE
+%{_mandir}/man8/btrfs-extent-same*.8*
+%{_mandir}/man8/duperemove*.8*
+%{_mandir}/man8/hashstats*.8*
+%{_mandir}/man8/show-shared-extents*.8*
+%{_sbindir}/btrfs-extent-same
+%{_sbindir}/duperemove
+%{_sbindir}/hashstats
+%{_sbindir}/show-shared-extents
+
+%changelog
+* Fri Oct 19 2018 Jonathan Dieter <jdieter@gmail.com> - 0.11-2
+- Add missing BR
+- Fix build to use build flags
+
+* Sat Oct 13 2018 Jonathan Dieter <jdieter@gmail.com> - 0.11-1
+- Bump to 0.11
+- Unbundle xxhash
+
+* Fri Nov 13 2015 Francesco Frassinelli <fraph24@gmail.com> - 0.10-1
+- Version bump; license and minor packaging issues fixed
+
+* Thu Jul 30 2015 Francesco Frassinelli <fraph24@gmail.com> - 0.09.5-2
+- %%license macro added
+
+* Sun Jul 19 2015 Francesco Frassinelli <fraph24@gmail.com> - 0.09.5-1
+- Initial build
+
diff --git a/sources b/sources
new file mode 100644
index 0000000..8166c05
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (duperemove-0.11.tar.gz) = b1bc2beb92223f9b46f8838e2f983ec763a9dff302f4202a34cc5e10591b985519f0464b6eba566c56872e671ba80583c7fdf4a232325086141d011384a286cf