diff --git a/.gitignore b/.gitignore
index 76e0acc..07f9226 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@
 /proc-macro-error-1.0.1.crate
 /proc-macro-error-1.0.2.crate
 /proc-macro-error-1.0.3.crate
+/proc-macro-error-1.0.4.crate
diff --git a/rust-proc-macro-error.spec b/rust-proc-macro-error.spec
index 00b6340..2e7d52c 100644
--- a/rust-proc-macro-error.spec
+++ b/rust-proc-macro-error.spec
@@ -6,8 +6,8 @@
 %global crate proc-macro-error
 
 Name:           rust-%{crate}
-Version:        1.0.3
-Release:        2%{?dist}
+Version:        1.0.4
+Release:        1%{?dist}
 Summary:        Almost drop-in replacement to panics in proc-macros
 
 # Upstream license specification: MIT OR Apache-2.0
@@ -53,6 +53,30 @@ which use "default" feature of "%{crate}" crate.
 %files       -n %{name}+default-devel
 %ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
+%package     -n %{name}+syn-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+syn-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "syn" feature of "%{crate}" crate.
+
+%files       -n %{name}+syn-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+syn-error-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+syn-error-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "syn-error" feature of "%{crate}" crate.
+
+%files       -n %{name}+syn-error-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
 %cargo_prep
@@ -72,6 +96,9 @@ which use "default" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Wed Aug 26 2020 Josh Stone <jistone@redhat.com> - 1.0.4-1
+- Update to 1.0.4
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.0.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
 
diff --git a/sources b/sources
index 43e753b..ddaceb5 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (proc-macro-error-1.0.3.crate) = a689eef04fb86c87172ca718049e34d7a1b20ecc95ab981b94348161f1461a31df6b89d96177e8d9912908e40dc297aefc673aa3938dfaa65ae7155b89678769
+SHA512 (proc-macro-error-1.0.4.crate) = 8a47bc9d3e24e9561d1e384d8f5a633284c2cf9b5e6733c5f9d1dbfe1870ccc8e2152482852e50b551cecb68e009148585b910ffb0508a7b4875598eaf8657db