Dependencies lcdf typetools与Gentoo中的openmpi冲突

下面是运行nice-n15 emerge-abvuDN-quiet build=y-autounmask write-ignore build slot操作符deps=y-backtrack=50 world后的输出

然后我屏蔽了lcdf typetools并运行了相同的更新命令，如图所示

* Error: The above package list contains packages which cannot be 
 * installed at the same time on the same system. 

  (sys-cluster/openmpi-1.4.3::gentoo, ebuild scheduled for merge) pulled in by 
    sys-cluster/openmpi[cxx?,fortran?,romio?,threads?] (sys-cluster/openmpi[cxx,fortran,romio]) required by (virtual/mpi-2.0-r3::gentoo, ebuild scheduled for merge) 
    sys-cluster/openmpi[cxx] required by (dev-libs/boost-1.55.0-r1::gentoo, ebuild scheduled for merge) 

  (app-text/lcdf-typetools-2.104::gentoo, ebuild scheduled for merge) pulled in by 
    >=app-text/lcdf-typetools-2.92[kpathsea] required by (app-text/texlive-2012::gentoo, installed) 


For more information about Blocked Packages, please refer to the following 
section of the Gentoo Linux x86 Handbook (architecture is irrelevant): 

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked 


The following mask changes are necessary to proceed: 
 (see "package.unmask" in the portage(5) man page for more details) 
# required by app-text/texlive-2012 
# required by @selected 
# required by @world (argument) 
# /etc/portage/package.mask/a: 
#=sci-mathematics/petsc-3.5.1 
#=app-text/poppler-0.24.5 
#=app-text/poppler-0.24.5 
#net-libs/webkit-gtk 
#<=x11-drivers/nvidia-drivers-340.46 
=app-text/lcdf-typetools-2.104 

NOTE: The --autounmask-keep-masks option will prevent emerge 
      from creating package.unmask or ** keyword changes. 

我怎样才能解决这场冲突？它已经在那里好几天了

更新：

我试着解开需要openmpi的两个原子，但它仍然被其他原子拉扯

注释

openmpi对我来说非常重要，不安装它是不可妥协的。

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lcdf typetools由texlive-2012提供，这也是我经常使用的关键软件包之一

您应该出现无法同时安装的软件包之一

emerge app-text/lcdf-typetools

或

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然后尝试更新整个系统。

听起来这两个软件包不能同时安装。有没有可能自己出现依赖项。谢谢@JohnMercier，你能举例说明如何单独出现依赖项吗？我忘了回头查看。我刚才补充了我的答案。这有用吗？

emerge app-text/lcdf-typetools

emerge sys-cluster/openmpi