diff --git a/mingw-winpthreads.spec b/mingw-winpthreads.spec
index 88fd9ccb69597a1f8d512717c7eeb90b1649f792..aa03283615f3b20c91b86b06ab7502af4aedad45 100644
--- a/mingw-winpthreads.spec
+++ b/mingw-winpthreads.spec
@@ -1,42 +1,18 @@
 %?mingw_package_header
 
-#%%global snapshot_date 20160204
-#%%global snapshot_rev 38410ad06264949efcb331f7a63575c6be31c5e4
-#%%global snapshot_rev_short %(echo %snapshot_rev | cut -c1-6)
-#%%global branch trunk
-
-#%%global pre rc2
-
-# Run the testsuite
 %global enable_tests 0
 
 Name:           mingw-winpthreads
 Version:        6.0.0
-Release:        3%{?dist}
+Release:        4
 Summary:        MinGW pthread library
-
-# The main license of winpthreads is MIT, but parts of this library
-# are derived from the "Posix Threads library for Microsoft Windows"
-# http://locklessinc.com/articles/pthreads_on_windows/
 License:        MIT and BSD
 URL:            http://mingw-w64.sourceforge.net/
-%if 0%{?snapshot_date}
-# To regenerate a snapshot:
-# Use your regular webbrowser to open https://sourceforge.net/p/mingw-w64/mingw-w64/ci/%{snapshot_rev}/tarball
-# This triggers the SourceForge instructure to generate a snapshot
-# After that you can pull in the archive with:
-# spectool -g mingw-headers.spec
-Source0:        http://sourceforge.net/code-snapshots/git/m/mi/mingw-w64/mingw-w64.git/mingw-w64-mingw-w64-%{snapshot_rev}.zip
-%else
-Source0:        http://downloads.sourceforge.net/mingw-w64/mingw-w64-v%{version}%{?pre:-%{pre}}.tar.bz2
-%endif
-
+Source0:        http://downloads.sourceforge.net/mingw-w64/mingw-w64-v%{version}.tar.bz2
 BuildArch:      noarch
-
-BuildRequires:  mingw32-filesystem >= 95
-BuildRequires:  mingw64-filesystem >= 95
-BuildRequires:  mingw32-gcc-c++
-BuildRequires:  mingw64-gcc-c++
+BuildRequires:  mingw32-filesystem >= 95 mingw64-filesystem >= 95
+BuildRequires:  mingw32-gcc-c++ mingw64-gcc-c++
+BuildRequires:  mingw32-crt mingw64-crt
 
 %if 0%{?enable_tests}
 BuildRequires:  wine-wow
@@ -57,7 +33,6 @@ Win32 does not, and is unlikely to ever, support pthreads
 natively. This project seeks to provide a freely available and
 high-quality solution to this problem.
 
-# Win32
 %package -n mingw32-winpthreads
 Summary:        MinGW pthread library for the win32 target
 Obsoletes:      mingw32-pthreads < 2.8.0-25.20110511cvs
@@ -87,7 +62,6 @@ Provides:       mingw32-pthreads-static = 2.8.0-25.20110511cvs
 %description -n mingw32-winpthreads-static
 Static version of the MinGW Windows pthreads library.
 
-# Win64
 %package -n mingw64-winpthreads
 Summary:        MinGW pthread library for the win64 target
 Obsoletes:      mingw64-pthreads < 2.8.0-25.20110511cvs
@@ -122,15 +96,7 @@ Static version of the MinGW Windows pthreads library.
 
 
 %prep
-%if 0%{?snapshot_date}
-rm -rf mingw-w64-v%{version}
-mkdir mingw-w64-v%{version}
-cd mingw-w64-v%{version}
-unzip %{S:0}
-%autosetup -p1 -D -T -n mingw-w64-v%{version}/mingw-w64-mingw-w64-%{snapshot_rev}
-%else
-%autosetup -p1 -n mingw-w64-v%{version}%{?pre:-%{pre}}
-%endif
+%autosetup -p1 -n mingw-w64-v%{version}
 
 
 %build
@@ -143,17 +109,14 @@ popd
 %if 0%{?enable_tests}
 
 %check
-# Prepare a wine prefix
 export WINEPREFIX=/tmp/wine-winpthreads
 mkdir $WINEPREFIX
 winecfg || :
 
-# Run the tests
 pushd mingw-w64-libraries/winpthreads
     %mingw_make check -k || :
 popd
 
-# Clean up the wine prefix
 wineserver --kill || :
 rm -rf /tmp/wine-winpthreads
 
@@ -165,11 +128,9 @@ pushd mingw-w64-libraries/winpthreads
     %mingw_make install DESTDIR=$RPM_BUILD_ROOT
 popd
 
-# Drop all .la files
 find $RPM_BUILD_ROOT -name "*.la" -delete
 
 
-# Win32
 %files -n mingw32-winpthreads
 %license COPYING
 %{mingw32_bindir}/libwinpthread-1.dll
@@ -187,7 +148,6 @@ find $RPM_BUILD_ROOT -name "*.la" -delete
 %{mingw32_libdir}/libwinpthread.a
 %{mingw32_libdir}/libpthread.a
 
-# Win64
 %files -n mingw64-winpthreads
 %license COPYING
 %{mingw64_bindir}/libwinpthread-1.dll
@@ -207,5 +167,8 @@ find $RPM_BUILD_ROOT -name "*.la" -delete
 
 
 %changelog
+* Wed Nov 04 2020 Zhiyi Weng <zhiyi@iscas.ac.cn> - 6.0.0-4
+- Add build require mingw-crt for bootstrap.
+
 * Fri Oct 09 2020 Zhiyi Weng <zhiyi@iscas.ac.cn> - 6.0.0-3
 - Initial version.