Resolving dependencies...
Configuring lambda-bridge-0.1...
Building lambda-bridge-0.1...
Failed to install lambda-bridge-0.1
Build log ( /home/builder/.cabal/logs/lambda-bridge-0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-31479/lambda-bridge-0.1'
Configuring lambda-bridge-0.1...
Building lambda-bridge-0.1...
Preprocessing library lambda-bridge-0.1...
[1 of 1] Compiling Foreign.LambdaBridge ( Foreign/LambdaBridge.hs, dist/build/Foreign/LambdaBridge.o )

Foreign/LambdaBridge.hs:17:1: warning: [-Wtabs]
    Tab character found here, and in 33 further locations.
    Please use spaces instead.
connect/lb_board_connect.c: In function ‘lb_board_connect’:

connect/lb_board_connect.c:95:3: error:
     warning: implicit declaration of function ‘execvP’ [-Wimplicit-function-declaration]
       execvP(driver,lb_path,argv2);
       ^
connect/lb_board_connect.c: In function ‘lb_board_connect’:

connect/lb_board_connect.c:95:3: error:
     warning: implicit declaration of function ‘execvP’ [-Wimplicit-function-declaration]
       execvP(driver,lb_path,argv2);
       ^
Preprocessing executable 'haskell-test1' for lambda-bridge-0.1...
[1 of 2] Compiling Foreign.LambdaBridge ( Foreign/LambdaBridge.hs, dist/build/haskell-test1/haskell-test1-tmp/Foreign/LambdaBridge.o )

Foreign/LambdaBridge.hs:17:1: warning: [-Wtabs]
    Tab character found here, and in 33 further locations.
    Please use spaces instead.
[2 of 2] Compiling Main             ( examples/haskell-test1/Main.hs, dist/build/haskell-test1/haskell-test1-tmp/Main.o )

examples/haskell-test1/Main.hs:14:1: warning: [-Wtabs]
    Tab character found here, and in six further locations.
    Please use spaces instead.
connect/lb_board_connect.c: In function ‘lb_board_connect’:

connect/lb_board_connect.c:95:3: error:
     warning: implicit declaration of function ‘execvP’ [-Wimplicit-function-declaration]
       execvP(driver,lb_path,argv2);
       ^
Linking dist/build/haskell-test1/haskell-test1 ...
dist/build/haskell-test1/haskell-test1-tmp/connect/lb_board_connect.o: In function `lb_board_connect':
lb_board_connect.c:(.text+0x3ba): undefined reference to `execvP'
collect2: error: ld returned 1 exit status
`gcc' failed in phase `Linker'. (Exit code: 1)
cabal: Leaving directory '/tmp/cabal-tmp-31479/lambda-bridge-0.1'
cabal: Error: some packages failed to install:
lambda-bridge-0.1 failed during the building phase. The exception was:
ExitFailure 1