diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..4e96434
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+PREFIX ?= /usr
+RPMMACRODIR ?= $(PREFIX)/lib/rpm/macros.d
+RPMSCRIPTDIR ?= $(PREFIX)/lib/rpm/rust-rpm-macros
+
+.PHONY: install
+install:
+	install -D -m644 macros.buildsystem.rustcrates $(DESTDIR)$(RPMMACRODIR)/macros.buildsystem.rustcrates
+	install -D -m755 rustcrates-gen-feature-specparts.sh $(DESTDIR)$(RPMSCRIPTDIR)/rustcrates-gen-feature-specparts.sh
diff --git a/macros.buildsystem.rustcrates b/macros.buildsystem.rustcrates
index 8b23958..0e73946 100644
--- a/macros.buildsystem.rustcrates
+++ b/macros.buildsystem.rustcrates
@@ -1,13 +1,17 @@
+%global rustcrates_dynspec_helper %{_rpmconfigdir}/rust-rpm-macros/rustcrates-gen-feature-specparts.sh
+
 # Example buildsystem for rust crates
-%buildsystem_rustcrates_prep() %{expand:\\\
-  %autosetup -C -p1 %*  \\\
+%buildsystem_rustcrates_prep() %{expand:\
+  %autosetup -C -p1 %* \
 }
 %buildsystem_rustcrates_conf() %nil
-%buildsystem_rustcrates_build() %nil
-%buildsystem_rustcrates_install() %{expand:\\\
-  %__install -d %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version} ; \\\
-  %__cp -a . %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version}/ ; \\\
-  %__rm -f %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version}/*checksum.json ; \\\
-  echo '{"files":{},"package":null}' > %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version}/.cargo-checksum.json \\\
+%buildsystem_rustcrates_build() %{expand:\
+  %{rustcrates_dynspec_helper} "%{_sourcedir}" \
 }
-%buildsystem_rustcrates_check() %nil
\ No newline at end of file
+%buildsystem_rustcrates_install() %{expand:\
+  %__install -d %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version} ; \
+  %__cp -a . %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version}/ ; \
+  %__rm -f %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version}/*checksum.json ; \
+  echo '{"files":{},"package":null}' > %{buildroot}%{_datadir}/cargo/registry/%{crate_name}-%{version}/.cargo-checksum.json \
+}
+%buildsystem_rustcrates_check() %nil
diff --git a/rustcrates-gen-feature-specparts.sh b/rustcrates-gen-feature-specparts.sh
new file mode 100644
index 0000000..6cbad5d
--- /dev/null
+++ b/rustcrates-gen-feature-specparts.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+set -euo pipefail
+
+SOURCEDIR="${1:-}"
+if [[ -z "$SOURCEDIR" ]]; then
+    echo "usage: $0 SOURCEDIR" >&2
+    exit 2
+fi
+
+if [[ -z "${RPM_SPECPARTS_DIR:-}" || ! -d "$RPM_SPECPARTS_DIR" ]]; then
+    echo "error: dynamic spec generation is not supported by this RPM version (missing RPM_SPECPARTS_DIR)" >&2
+    exit 1
+fi
+
+set -- "$SOURCEDIR"/*.spec
+SPEC_SELF="$1"
+SPECPART="$RPM_SPECPARTS_DIR/50-feature-files.specpart"
+
+: > "$SPECPART"
+
+if [[ ! -f "$SPEC_SELF" ]]; then
+    echo "warning: no spec file found in $SOURCEDIR" >&2
+    exit 0
+fi
+
+if ! awk '
+    /^[[:space:]]*%package[[:space:]]+/ {
+        if (match($0, /-n[[:space:]]+%\{name\}\+([A-Za-z0-9_.-]+)/, m) && !seen[m[1]]++) {
+            print "%files -n %{name}+" m[1]
+            print ""
+            found = 1
+        }
+    }
+    END {
+        exit(found ? 0 : 2)
+    }
+' "$SPEC_SELF" > "$SPECPART"; then
+    echo "warning: no feature subpackages parsed from $SPEC_SELF" >&2
+fi