diff --git a/foma-harden-build.patch b/foma-harden-build.patch
deleted file mode 100644
index caba9ba..0000000
--- a/foma-harden-build.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-From: Tomáš Chvátal <tchvatal@suse.com>
-Date: 2018-09-27 07:28:30+0000
-
----
- Makefile |    8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
-Index: foma/Makefile
-===================================================================
---- a/foma.orig/Makefile
-+++ a/foma/Makefile
-@@ -23,13 +23,13 @@ LIBOBJS = int_stack.o define.o determini
- all: libfoma foma flookup cgflookup
- 
- foma: $(FOMAOBJS) $(LIBOBJS)
--	$(CC) $(CFLAGS) $(FOMAOBJS) $(LIBOBJS) $(LDFLAGS) -o $@
-+	$(CC) $(CFLAGS) -pie -Wl,-z,now $(FOMAOBJS) $(LIBOBJS) $(LDFLAGS) -o $@
- 
- flookup: flookup.o libfoma
--	$(CC) $(CFLAGS) flookup.o $(FLOOKUPLDFLAGS) -o $@
-+	$(CC) $(CFLAGS) -pie -Wl,-z,now flookup.o $(FLOOKUPLDFLAGS) -o $@
- 
- cgflookup: cgflookup.o libfoma
--	$(CC) $(CFLAGS) cgflookup.o $(FLOOKUPLDFLAGS) -o $@
-+	$(CC) $(CFLAGS) -pie -Wl,-z,now cgflookup.o $(FLOOKUPLDFLAGS) -o $@
- 
- STATICLIB = libfoma.a
- 
-@@ -72,7 +72,7 @@ libfoma: $(SHAREDLIBV)
- $(SHAREDLIBV): $(LIBOBJS)
- 	$(AR) $(ARFLAGS) $(STATICLIB) $(LIBOBJS)
- 	$(RANLIB) $(STATICLIB)
--	$(CC) $(CFLAGS) -shared -Wl,$(DFLAG),$(SHAREDLIBM) -o $(SHAREDLIBV) $(LIBOBJS) $(LDFLAGS)
-+	$(CC) $(CFLAGS) -shared -Wl,-z,now,$(DFLAG),$(SHAREDLIBM) -o $(SHAREDLIBV) $(LIBOBJS) $(LDFLAGS)
- 
- install: foma libfoma libfoma.pc
- 	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
diff --git a/foma.changes b/foma.changes
index 2ca53e5..20bd429 100644
--- a/foma.changes
+++ b/foma.changes
@@ -3,7 +3,8 @@ Fri May 17 06:34:16 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
 
 - Update to git snapshot 0.10.0+git22 (e0d8122)
   * Build fixes for various compilers and C++ standard modes
-- Drop foma-gcc14.patch (merged)
+- Drop foma-gcc14.patch (merged), delete foma-harden-build.patch
+  (obsolete)
 
 -------------------------------------------------------------------
 Mon May 13 12:10:56 UTC 2024 - pgajdos@suse.com
diff --git a/foma.spec b/foma.spec
index 3ba29e1..3113010 100644
--- a/foma.spec
+++ b/foma.spec
@@ -25,11 +25,11 @@ Summary:        Finite-state compiler and C library
 License:        Apache-2.0
 URL:            https://fomafst.github.io/
 Source:         foma-%version.tar.xz
-Patch1:         foma-harden-build.patch
 BuildRequires:  bison
+BuildRequires:  cmake
 BuildRequires:  flex
 BuildRequires:  ncurses-devel
-BuildRequires:  pkgconfig
+BuildRequires:  pkg-config
 BuildRequires:  readline-devel
 BuildRequires:  pkgconfig(zlib)
 
@@ -58,24 +58,19 @@ Requires:       %{libname} = %{version}
 Finite-state C library development files and headers for %{name}.
 
 %prep
-%autosetup -p2 -n %{name}-%{version}/%{name}
-
-sed -i '/^CFLAGS/c\CFLAGS = %{optflags} -fcommon -Wl,--as-needed -D_GNU_SOURCE -std=c99 -fvisibility=hidden -fPIC' Makefile
-sed -i '/^LDFLAGS/c\LDFLAGS = -lreadline -lz -lreadline -fpic' Makefile
-sed -i '/^FLOOKUPLDFLAGS/c\FLOOKUPLDFLAGS = libfoma.a -lz -fpic' Makefile
+%autosetup -p1
 
 %build
-# hand written Makefile that gets to be quite PITA
-%make_build -j1
+pushd foma/
+%cmake
+%cmake_build
+popd
 
 %install
-%make_install \
-	prefix="%{buildroot}/%{_prefix}" \
-	libdir="%{buildroot}/%{_libdir}"
-rm -Rf "%{buildroot}/%{_libdir}"/*.a
-# github.com/mhulden/foma/issues/127
-perl -i -pe 's{\Q%{buildroot}\E}{}' "%{buildroot}/%{_libdir}/pkgconfig"/*.pc
-cat "%{buildroot}/%{_libdir}/pkgconfig"/*.pc
+pushd foma/
+%cmake_install
+popd
+find "%buildroot" -type f -name "*.a" -print -delete
 
 %ldconfig_scriptlets -n %libname
 
@@ -91,7 +86,7 @@ cat "%{buildroot}/%{_libdir}/pkgconfig"/*.pc
 %{_libdir}/pkgconfig/libfoma.pc
 
 %files -n %{libname}
-%license COPYING
+%license foma/COPYING
 %{_libdir}/libfoma.so.*
 
 %changelog