diff --git a/tooling/package/build-deb.sh b/tooling/package/build-deb.sh
index 585e7e55c..cd0012c55 100755
--- a/tooling/package/build-deb.sh
+++ b/tooling/package/build-deb.sh
@@ -99,7 +99,7 @@ DEPS=$(cd "$DEPS_DIR" && for bin in "$STAGING_ABS"/usr/bin/*; do
 	dpkg-shlibdeps -O --ignore-missing-info "$bin" || exit 1
 done \
 	| sed 's/^shlibs:Depends=//' | tr ',' '\n' | sed 's/^ //;s/ $//' | sort -u \
-	| paste -sd', ' -)
+	| paste -sd, -)
 echo "declared deps: $DEPS"
 
 cat > "$STAGING/DEBIAN/control" <<EOF
diff --git a/tooling/package/build-rpm.sh b/tooling/package/build-rpm.sh
index c3ba423bc..7763fb59c 100755
--- a/tooling/package/build-rpm.sh
+++ b/tooling/package/build-rpm.sh
@@ -26,21 +26,26 @@ TOP=$(pwd)/target/pkg/rpm
 rm -rf "$TOP"
 mkdir -p "$TOP"/{BUILD,RPMS,SOURCES,SPECS,BUILDROOT}
 
-ROOT="$TOP/BUILDROOT/oak-editor-$VERSION-1.x86_64"
-mkdir -p "$ROOT/usr/bin" "$ROOT/usr/share/applications" \
-	"$ROOT/usr/share/icons/hicolor/512x512/apps" "$ROOT/usr/share/oak/i18n" \
-	"$ROOT/usr/share/icons/hicolor/scalable/apps"
+# Stage the payload; the spec's %install copies it into rpmbuild's own
+# %{buildroot}. rpm 4.20+ (Fedora 43) computes the buildroot itself and
+# ignores a caller-supplied `buildroot` define, so the spec must install
+# through the macro.
+STAGE="$TOP/stage"
+mkdir -p "$STAGE/usr/bin" "$STAGE/usr/share/applications" \
+	"$STAGE/usr/share/icons/hicolor/512x512/apps" "$STAGE/usr/share/oak/i18n" \
+	"$STAGE/usr/share/icons/hicolor/scalable/apps"
 install -m755 target/release/oak-editor target/release/oak-cli target/release/oak-worker \
-	"$ROOT/usr/bin/"
-install -m644 packaging/oak.desktop "$ROOT/usr/share/applications/oak.desktop"
-install -m644 icons/icon.png "$ROOT/usr/share/icons/hicolor/512x512/apps/oak.png"
-install -m644 Oak_Icon.svg "$ROOT/usr/share/icons/hicolor/scalable/apps/oak.svg"
-install -m644 assets/i18n/*.yaml "$ROOT/usr/share/oak/i18n/"
+	"$STAGE/usr/bin/"
+install -m644 packaging/oak.desktop "$STAGE/usr/share/applications/oak.desktop"
+install -m644 icons/icon.png "$STAGE/usr/share/icons/hicolor/512x512/apps/oak.png"
+install -m644 Oak_Icon.svg "$STAGE/usr/share/icons/hicolor/scalable/apps/oak.svg"
+install -m644 assets/i18n/*.yaml "$STAGE/usr/share/oak/i18n/"
 
 rpmbuild -bb \
 	--define "_topdir $TOP" \
 	--define "_version $VERSION" \
-	--define "buildroot $ROOT" \
+	--define "_oak_stage $STAGE" \
+	--define "source_date_epoch_from_changelog 0" \
 	--define "_binary_payload w6.zstdio" \
 	tooling/package/oak.spec
 
diff --git a/tooling/package/oak.spec b/tooling/package/oak.spec
index 165a5b766..7372b2408 100644
--- a/tooling/package/oak.spec
+++ b/tooling/package/oak.spec
@@ -29,9 +29,11 @@ Oak is a non-linear video editor written in Rust (OpenFX plug-in host,
 proxy editing, multicam, hardware decoding).
 
 %install
-# Everything is staged into %{buildroot} by the caller (build-rpm.sh);
-# nothing to compile here.
-true
+# The caller staged the payload in %{_oak_stage} (build-rpm.sh); rpm
+# 4.20+ computes %{buildroot} itself, so copy the tree in through the
+# macro instead of relying on a caller-supplied buildroot define.
+install -d %{buildroot}
+cp -a %{_oak_stage}/usr %{buildroot}/
 
 %files
 /usr/bin/oak-editor
@@ -43,3 +45,5 @@ true
 /usr/share/oak/i18n/
 
 %changelog
+* Thu Sep 24 2026 Oak Team <noreply@oakvideoeditor.org> - 0.5.0-1
+- Release build of the Rust rewrite.