diff --git a/.gitignore b/.gitignore
index 93425cc..854b700 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@
 /once_cell-1.3.1.crate
 /once_cell-1.4.0.crate
 /once_cell-1.4.1.crate
+/once_cell-1.5.1.crate
diff --git a/rust-once_cell.spec b/rust-once_cell.spec
index c4761dc..86dc649 100644
--- a/rust-once_cell.spec
+++ b/rust-once_cell.spec
@@ -1,11 +1,11 @@
-# Generated by rust2rpm 13
+# Generated by rust2rpm 15
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate once_cell
 
 Name:           rust-%{crate}
-Version:        1.4.1
+Version:        1.5.1
 Release:        1%{?dist}
 Summary:        Single assignment cells and lazy values
 
@@ -52,6 +52,18 @@ which use "default" feature of "%{crate}" crate.
 %files       -n %{name}+default-devel
 %ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
+%package     -n %{name}+alloc-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+alloc-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "alloc" feature of "%{crate}" crate.
+
+%files       -n %{name}+alloc-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
 %package     -n %{name}+parking_lot-devel
 Summary:        %{summary}
 BuildArch:      noarch
@@ -76,6 +88,18 @@ which use "std" feature of "%{crate}" crate.
 %files       -n %{name}+std-devel
 %ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
+%package     -n %{name}+unstable-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+unstable-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "unstable" feature of "%{crate}" crate.
+
+%files       -n %{name}+unstable-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
 %cargo_prep
@@ -95,6 +119,10 @@ which use "std" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Wed Nov 11 2020 Fabio Valentini <decathorpe@gmail.com> - 1.5.1-1
+- Update to version 1.5.1.
+- Fixes RHBZ#1896604
+
 * Tue Aug 18 2020 Jan Staněk <jstanek@redhat.com> - 1.4.1-1
 - Update to 1.4.1
 
diff --git a/sources b/sources
index 4f1ef46..82ba399 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (once_cell-1.4.1.crate) = 7d075cb115e6146a9e08e27fe123865bb54fb73c1da6c84f3ac991ff9f6f83bbb55245a9741279a12b72f143e3ed4ada3da7b13764e7655dfe64b70c5d6c1958
+SHA512 (once_cell-1.5.1.crate) = 4b967e308a79afff922b0563194622650240d4fdc598eb63a3ef4be1687a984b5f82a42aaff59ac098e9ba7bca4a57ade0ac1f84ef0bc32dc49544028fdb7d3e