Can't install Happstack in Windows
Windows 7 Professional x64
During the failing install process, I see three popups about missing Cygwin dll's.
```
C:\>ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.0.3
C:\>cabal --version
cabal-install version 0.10.2
using version 1.10.1.0 of the Cabal library
C:\>cabal install happstack
Resolving dependencies...
Configuring network-2.2.1.10...
expr: not found
sed: not found
C:\Program Files (x86)\OpenSSH\bin\sh.exe (4704): *** couldn't allocate cygwin h
eap, Win32 error 0, base 0x910000, top 0x912000, reserve_size 8192, allocsize 81
92, page_const 4096
C:\Program Files (x86)\OpenSSH\bin\sh.exe (4704): *** couldn't allocate cygwin h
eap, Win32 error 0, base 0x910000, top 0x912000, reserve_size 8192, allocsize 81
92, page_const 4096
141 [main] sh 2708 sync_with_child: child 4704(0x110) died before initializa
tion with status code 0x1
9834 [main] sh 2708 sync_with_child: *** child state waiting for longjmp
configure: Cannot fork: Resource temporarily unavailable
cabal: Error: some packages failed to install:
MissingH-1.1.0.3 depends on network-2.2.1.10 which failed to install.
happstack-6.0.0 depends on network-2.2.1.10 which failed to install.
happstack-ixset-6.0.1 depends on network-2.2.1.10 which failed to install.
happstack-server-6.0.3 depends on network-2.2.1.10 which failed to install.
happstack-state-6.0.0 depends on network-2.2.1.10 which failed to install.
happstack-util-6.0.0 depends on network-2.2.1.10 which failed to install.
hslogger-1.1.4 depends on network-2.2.1.10 which failed to install.
network-2.2.1.10 failed during the configure step. The exception was:
ExitFailure 2
network-bytestring-0.1.3.4 depends on network-2.2.1.10 which failed to
install.
sendfile-0.7.3 depends on network-2.2.1.10 which failed to install.
```
I'm worried that various Cygwin/MinGW programs I use are interfering with Haskell/Cabal:
- OpenSSH for Windows http://sshwindows.sourceforge.net/
- Calibre http://calibre-ebook.com/
- MinGW http://www.mingw.org/
- msysgit http://code.google.com/p/msysgit/
<details><summary>Trac metadata</summary>
| Trac field | Value |
| ---------------------- | ------------ |
| Version | 7.0.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture | |
</details>
<!-- {"blocked_by":[],"summary":"Can't install Happstack in Windows","status":"New","operating_system":"","component":"Compiler","related":[],"milestone":"","resolution":"Unresolved","owner":{"tag":"Unowned"},"version":"7.0.3","keywords":["cabal","cygwin","happstack","install","mingw"],"differentials":[],"test_case":"","architecture":"","cc":[""],"type":"Bug","description":"Windows 7 Professional x64\r\n\r\nDuring the failing install process, I see three popups about missing Cygwin dll's.\r\n\r\n{{{\r\nC:\\>ghc --version\r\nThe Glorious Glasgow Haskell Compilation System, version 7.0.3\r\nC:\\>cabal --version\r\ncabal-install version 0.10.2\r\nusing version 1.10.1.0 of the Cabal library\r\nC:\\>cabal install happstack\r\nResolving dependencies...\r\nConfiguring network-2.2.1.10...\r\nexpr: not found\r\nsed: not found\r\nC:\\Program Files (x86)\\OpenSSH\\bin\\sh.exe (4704): *** couldn't allocate cygwin h\r\neap, Win32 error 0, base 0x910000, top 0x912000, reserve_size 8192, allocsize 81\r\n92, page_const 4096\r\nC:\\Program Files (x86)\\OpenSSH\\bin\\sh.exe (4704): *** couldn't allocate cygwin h\r\neap, Win32 error 0, base 0x910000, top 0x912000, reserve_size 8192, allocsize 81\r\n92, page_const 4096\r\n 141 [main] sh 2708 sync_with_child: child 4704(0x110) died before initializa\r\ntion with status code 0x1\r\n 9834 [main] sh 2708 sync_with_child: *** child state waiting for longjmp\r\nconfigure: Cannot fork: Resource temporarily unavailable\r\ncabal: Error: some packages failed to install:\r\nMissingH-1.1.0.3 depends on network-2.2.1.10 which failed to install.\r\nhappstack-6.0.0 depends on network-2.2.1.10 which failed to install.\r\nhappstack-ixset-6.0.1 depends on network-2.2.1.10 which failed to install.\r\nhappstack-server-6.0.3 depends on network-2.2.1.10 which failed to install.\r\nhappstack-state-6.0.0 depends on network-2.2.1.10 which failed to install.\r\nhappstack-util-6.0.0 depends on network-2.2.1.10 which failed to install.\r\nhslogger-1.1.4 depends on network-2.2.1.10 which failed to install.\r\nnetwork-2.2.1.10 failed during the configure step. The exception was:\r\nExitFailure 2\r\nnetwork-bytestring-0.1.3.4 depends on network-2.2.1.10 which failed to\r\ninstall.\r\nsendfile-0.7.3 depends on network-2.2.1.10 which failed to install.\r\n}}}\r\n\r\nI'm worried that various Cygwin/MinGW programs I use are interfering with Haskell/Cabal:\r\n\r\n * OpenSSH for Windows http://sshwindows.sourceforge.net/\r\n * Calibre http://calibre-ebook.com/\r\n * MinGW http://www.mingw.org/\r\n * msysgit http://code.google.com/p/msysgit/","type_of_failure":"OtherFailure","blocking":[]} -->
issue