答案：

conda install -c bioconda racon

Racon是一个基于minimap和miniasm的，构建一致性序列（consensus）的一款软件，速度快是其特点。

一般这样就可以了。

# Install minimap and miniasm (requiring gcc and zlib)
git clone https://github.com/lh3/minimap && (cd minimap && make)
git clone https://github.com/lh3/minimap2 && (cd minimap2 && make)
git clone https://github.com/lh3/miniasm && (cd miniasm && make)

# Install Racon (requiring gcc 4.8+ or clang 3.4+, and cmake 3.2+)
git clone --recursive https://github.com/isovic/racon.git racon
cd racon
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make

不知道从什么时候其Github也开始不能稳定访问了，折腾了一圈，得到类似的错误。

/tmp/ccXiHDpV.s:5338: Error: no such instruction: `vpbroadcastd %xmm0,%ymm0'
/tmp/ccXiHDpV.s:5486: Error: no such instruction: `vpbroadcastd %xmm0,%ymm0'
/tmp/ccXiHDpV.s:6477: Error: no such instruction: `shlx %r9,%r15,%rax'
/tmp/ccXiHDpV.s:6489: Error: no such instruction: `shlx %r10,%r15,%r14'
/tmp/ccXiHDpV.s:6582: Error: no such instruction: `vpbroadcastq %xmm1,%ymm0'
/tmp/ccXiHDpV.s:6616: Error: no such instruction: `shlx %rbx,%rsi,%rdx'
/tmp/ccXiHDpV.s:6634: Error: no such instruction: `shlx %rdx,%r8,%rcx'

搜索提示是intel的新指令。

最后，得到了

conda install -c bioconda racon

这个解决方案。

感谢conda，感谢google，预祝conda持续成长。