diff --git a/rust.spec b/rust.spec
index dd55936..453219b 100644
--- a/rust.spec
+++ b/rust.spec
@@ -36,6 +36,7 @@
 %global _arch i586
 %endif
 %global rust_triple %{_arch}-unknown-linux-%{abi}
+# to bootstrap, change to bcond_without
 %bcond_without bootstrap
 Name:           rust
 Version:        1.15.0
@@ -49,7 +50,6 @@ Source1:        config.toml
 Source100:      %{name}-rpmlintrc
 # PATCH-FIX-OPENSUSE: Set DT_SONAME when building dylibs
 Patch1:         add-soname.patch
-BuildRequires:  cargo
 BuildRequires:  cmake
 BuildRequires:  curl
 BuildRequires:  gcc-c++
@@ -68,14 +68,17 @@ ExclusiveArch:  %{ix86} x86_64 %{arm} aarch64 ppc64 ppc64le
 BuildRequires:  fdupes
 %endif
 %ifnarch %{ix86} x86_64
+BuildRequires:  cargo-bootstrap
 BuildRequires:  rustc-bootstrap <= %{version}
 BuildRequires:  rustc-bootstrap >= %{prev_version}
     %else
     %if %{with bootstrap}
+BuildRequires:  cargo-bootstrap
 BuildRequires:  rustc-bootstrap <= %{version}
 BuildRequires:  rustc-bootstrap >= %{prev_version}
         %else
         %if %{without bootstrap}
+BuildRequires:  cargo
 BuildRequires:  rust <= %{version}
 BuildRequires:  rust >= %{prev_version}
         %endif
@@ -233,4 +236,4 @@ sed -e '/*\//q' src/libbacktrace/backtrace.h \
 %doc %{_docdir}/%{name}/html/*.js
 %doc %{_docdir}/%{name}/html/*.css
 
-%changelog
+%changelog
\ No newline at end of file