Stack: Hoogle Received ExitFailure 1

Created on 16 Mar 2020 · 19Comments · Source: commercialhaskell/stack

General summary/comments (optional)

hoogle commands don't work in lts-15 even from a fresh project

Steps to reproduce

$ stack new testhoogle
$ cd testhoogle
$ stack haddock
$ stack hoogle --setup --verbose
Version 2.1.3.1 x86_64 hpack-0.31.2
2020-03-17 09:12:38.832822: [debug] Checking for project config at: /Users/davidspies/testhoogle/stack.yaml
2020-03-17 09:12:38.833261: [debug] Loading project config file stack.yaml
2020-03-17 09:12:38.837065: [debug] SELECT COUNT(*) FROM "last_performed" WHERE ("action"=?) AND ("timestamp">=?); [PersistInt64 1,PersistUTCTime 2020-03-16 16:12:38.837019 UTC]
2020-03-17 09:12:38.837432: [debug] Using package location completions from a lock file
2020-03-17 09:12:38.958762: [debug] Running hpack on /Users/davidspies/testhoogle/package.yaml
2020-03-17 09:12:38.961305: [debug] hpack output unchanged in /Users/davidspies/testhoogle/testhoogle.cabal
2020-03-17 09:12:38.963102: [warn] Stack has not been tested with GHC versions above 8.6, and using 8.8.3, this may fail
2020-03-17 09:12:38.963436: [debug] Installed tools:
 - ghc-8.6.4
 - ghc-8.6.5
 - ghc-8.8.3
 - ghc-8.2.2
 - ghc-8.8.2
 - ghc-8.4.4
2020-03-17 09:12:38.963793: [debug] Potential GHC builds: standard
2020-03-17 09:12:38.963841: [debug] Found already installed GHC builds: standard
2020-03-17 09:12:38.964057: [debug] SELECT "id","actual_version","arch","ghc_path","ghc_size","ghc_modified","ghc_pkg_path","runghc_path","haddock_path","cabal_version","global_db","global_db_cache_size","global_db_cache_modified","info","global_dump" FROM "compiler_cache" WHERE "ghc_path"=?; [PersistText "/Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-8.8.3"]
2020-03-17 09:12:39.009270: [debug] Loaded compiler information from cache
2020-03-17 09:12:39.009382: [warn] Stack has not been tested with Cabal versions above 2.4, but version 3.0.1.0 was found, this may fail
2020-03-17 09:12:39.010325: [debug] Resolving package entries
2020-03-17 09:12:39.010384: [debug] Parsing the targets
2020-03-17 09:12:39.012419: [debug] Checking flags
2020-03-17 09:12:39.012460: [debug] SourceMap constructed
2020-03-17 09:12:39.016555: [debug] Starting to execute command inside EnvConfig
2020-03-17 09:12:39.016907: [debug] Run process: /Users/davidspies/.local/bin/hoogle --numeric-version
2020-03-17 09:12:39.073053: [debug] Process finished in 56ms: /Users/davidspies/.local/bin/hoogle --numeric-version
2020-03-17 09:12:39.073312: [warn] No Hoogle database yet. Automatically building haddocks and hoogle database (use --no-setup to disable) ...
2020-03-17 09:12:39.073415: [debug] Using package location completions from a lock file
2020-03-17 09:12:39.194543: [warn] Stack has not been tested with GHC versions above 8.6, and using 8.8.3, this may fail
2020-03-17 09:12:39.194927: [debug] Installed tools:
 - ghc-8.6.4
 - ghc-8.6.5
 - ghc-8.8.3
 - ghc-8.2.2
 - ghc-8.8.2
 - ghc-8.4.4
2020-03-17 09:12:39.195053: [debug] Potential GHC builds: standard
2020-03-17 09:12:39.195083: [debug] Found already installed GHC builds: standard
2020-03-17 09:12:39.195247: [debug] SELECT "id","actual_version","arch","ghc_path","ghc_size","ghc_modified","ghc_pkg_path","runghc_path","haddock_path","cabal_version","global_db","global_db_cache_size","global_db_cache_modified","info","global_dump" FROM "compiler_cache" WHERE "ghc_path"=?; [PersistText "/Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-8.8.3"]
2020-03-17 09:12:39.238072: [debug] Loaded compiler information from cache
2020-03-17 09:12:39.238194: [warn] Stack has not been tested with Cabal versions above 2.4, but version 3.0.1.0 was found, this may fail
2020-03-17 09:12:39.238598: [debug] Resolving package entries
2020-03-17 09:12:39.238647: [debug] Parsing the targets
2020-03-17 09:12:39.241027: [debug] Checking flags
2020-03-17 09:12:39.241065: [debug] SourceMap constructed
2020-03-17 09:12:39.244908: [debug] Starting to execute command inside EnvConfig
2020-03-17 09:12:39.246324: [debug] Finding out which packages are already installed
2020-03-17 09:12:39.246695: [debug] Run process: /Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-pkg-8.8.3 --global --no-user-package-db dump --expand-pkgroot
2020-03-17 09:12:39.309817: [debug] Process finished in 63ms: /Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-pkg-8.8.3 --global --no-user-package-db dump --expand-pkgroot
2020-03-17 09:12:39.313579: [debug] Run process: /Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-pkg-8.8.3 --user --no-user-package-db --package-db /Users/davidspies/.stack/snapshots/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/pkgdb dump --expand-pkgroot
2020-03-17 09:12:39.361199: [debug] Process finished in 48ms: /Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-pkg-8.8.3 --user --no-user-package-db --package-db /Users/davidspies/.stack/snapshots/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/pkgdb dump --expand-pkgroot
2020-03-17 09:12:39.361459: [debug] Run process: /Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-pkg-8.8.3 --user --no-user-package-db --package-db /Users/davidspies/testhoogle/.stack-work/install/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/pkgdb dump --expand-pkgroot
2020-03-17 09:12:39.411755: [debug] Process finished in 50ms: /Users/davidspies/.stack/programs/x86_64-osx/ghc-8.8.3/bin/ghc-pkg-8.8.3 --user --no-user-package-db --package-db /Users/davidspies/testhoogle/.stack-work/install/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/pkgdb dump --expand-pkgroot
2020-03-17 09:12:39.412270: [debug] Constructing the build plan
2020-03-17 09:12:39.413511: [debug] SELECT "id","directory","type","pkg_src","active","path_env_var","haddock" FROM "config_cache" WHERE "directory"=? AND "type"=?; [PersistText "/Users/davidspies/testhoogle/.stack-work/install/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/",PersistText "lib:testhoogle-0.1.0.0-AQ7NVcG0mkmClBnn1oJWKz"]
2020-03-17 09:12:39.413920: [debug] SELECT "id", "config_cache_id", "index", "option" FROM "config_cache_dir_option" WHERE ("config_cache_id"=?) ORDER BY "index"; [PersistInt64 2]
2020-03-17 09:12:39.414155: [debug] SELECT "id", "config_cache_id", "index", "option" FROM "config_cache_no_dir_option" WHERE ("config_cache_id"=?) ORDER BY "index"; [PersistInt64 2]
2020-03-17 09:12:39.414300: [debug] SELECT "id", "config_cache_id", "ghc_pkg_id" FROM "config_cache_dep" WHERE ("config_cache_id"=?); [PersistInt64 2]
2020-03-17 09:12:39.414489: [debug] SELECT "id", "config_cache_id", "component" FROM "config_cache_component" WHERE ("config_cache_id"=?); [PersistInt64 2]
2020-03-17 09:12:39.416146: [debug] Start: getPackageFiles /Users/davidspies/testhoogle/testhoogle.cabal
2020-03-17 09:12:39.418104: [debug] Finished in 2ms: getPackageFiles /Users/davidspies/testhoogle/testhoogle.cabal
2020-03-17 09:12:39.419172: [debug] Checking if we are going to build multiple executables with the same name
2020-03-17 09:12:39.419249: [debug] Executing the build plan
2020-03-17 09:12:39.420453: [info] Haddock index for local packages already up to date at:
/Users/davidspies/testhoogle/.stack-work/install/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/doc/index.html
2020-03-17 09:12:39.421161: [info] Haddock index for local packages and dependencies already up to date at:
/Users/davidspies/testhoogle/.stack-work/install/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/doc/all/index.html
2020-03-17 09:12:39.424789: [info] Haddock index for snapshot packages already up to date at:
/Users/davidspies/.stack/snapshots/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/doc/index.html
2020-03-17 09:12:39.425142: [info] Built docs.
2020-03-17 09:12:39.425588: [debug] Run process: /Users/davidspies/.local/bin/hoogle generate --local --database=/Users/davidspies/testhoogle/.stack-work/hoogle/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/database.hoo
Starting generate
Reading ghc-pkg... 0.09s

Packages missing documentation:                 array                 base                 binary                 bytestring                 Cabal                 containers                 deepseq                 directory                 filepath                 ghc                 ghc-boot                 ghc-boot-th                 ghc-compact                 ghc-heap                 ghc-prim                 ghci                 haskeline                 hpc                 integer-gmp                 libiserv                 mtl                 parsec                 pretty                 process                 stm                 template-haskell                 terminfo                 testhoogle                 text                 time                 transformers                 unix                 xhtml            rts
No packages were found, aborting (use no arguments to index all of Stackage)
2020-03-17 09:12:39.575777: [error] Received ExitFailure 1 when running
Raw command: /Users/davidspies/.local/bin/hoogle generate --local --database=/Users/davidspies/testhoogle/.stack-work/hoogle/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/database.hoo

Stack version

$ stack --version
Version 2.1.3.1 x86_64 hpack-0.31.2

Method of installation

Official binary, downloaded from stackage.org or fpcomplete's package repository
And then at some point stack upgrade

hoogle os x / macos further investigation required

Source

dspies-leapyear

👍8

Most helpful comment

Thanks @gittywithexcitement, that worked for me too.

To save people the (minimal) effort of converting fish to bash, here is my script:

#!/bin/bash
# Based on code by @gittywithexcitement :
# https://github.com/commercialhaskell/stack/issues/5228#issuecomment-629738842

stack haddock

LOCAL_DOC_ROOT=$(stack path --local-doc-root)
SNAPSHOT_DOC=$(stack path --snapshot-doc-root)
DATABASE="$(stack path --local-hoogle-root)/database.foo"

stack exec -- hoogle generate --local=$LOCAL_DOC_ROOT --local=$SNAPSHOT_DOC --database=$DATABASE

hoogle server --local --port=9876 --database=$DATABASE

Nielius on 31 May 2020

👍6

All 19 comments

Hello, thanks for the report. Would you please update the log with one produced using --verbose?

dbaynard on 16 Mar 2020

Done

dspies-leapyear on 17 Mar 2020

Thanks. It looks like it is hoogle that is failing — it may be being passed the wrong arguments. What version are you using?

stack --verbose exec -- hoogle --version

I would imagine the following produces the same, failed output:

stack --verbose exec -- hoogle generate --local --database=$(stack path)/database.hoo

It might be clear from the hoogle changelog what is going on.

dbaynard on 17 Mar 2020

$ stack install hoogle
$ stack exec hoogle -- --version
Stack has not been tested with GHC versions above 8.6, and using 8.8.3, this may fail
Stack has not been tested with Cabal versions above 2.4, but version 3.0.1.0 was found, this may fail
Hoogle 5.0.17.15, https://hoogle.haskell.org/

I copy-pasted the command that failed and wrapped it in stack exec:

$ stack exec -- /Users/davidspies/.local/bin/hoogle generate --local --database=/Users/davidspies/testhoogle/.stack-work/hoogle/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/database.hoo
Stack has not been tested with GHC versions above 8.6, and using 8.8.3, this may fail
Stack has not been tested with Cabal versions above 2.4, but version 3.0.1.0 was found, this may fail
Starting generate
Reading ghc-pkg... 0.07s

Packages missing documentation:                 array                 base                 binary                 bytestring                 Cabal                 containers                 deepseq                 directory                 filepath                 ghc                 ghc-boot                 ghc-boot-th                 ghc-compact                 ghc-heap                 ghc-prim                 ghci                 haskeline                 hpc                 integer-gmp                 libiserv                 mtl                 parsec                 pretty                 process                 stm                 template-haskell                 terminfo                 text                 time                 transformers                 unix                 xhtml            rts
No packages were found, aborting (use no arguments to index all of Stackage)

Same error

However, when I _don't_ wrap it in stack exec

$ /Users/davidspies/.local/bin/hoogle generate --local --database=/Users/davidspies/testhoogle/.stack-work/hoogle/x86_64-osx/f5a6c2ecaea5767a8268d6af4b93a0008e867891b1d58dc88ea8b85370eaa0e3/8.8.3/database.hoo
Starting generate
Reading ghc-pkg... 0.19s
[5/28] bytestring... 0.07s
[10/28] ghc... 1.77s
[27/28] xhtml... 0.04s
Packages missing documentation: rts
Found 49 warnings when processing items

Reordering items... 0.01s
Writing tags... 0.10s
Writing names... 0.05s
Writing types... 0.41s
Took 4.74s

It works

dspies-leapyear on 17 Mar 2020

@dspies-leapyear could you try running master version of Stack? A couple of months ago I did some Hoogle-related fixes , they could be a problem (unfortunately I didn't have time yet to look deeper into this issue yet)

qrilka on 18 Mar 2020

Also do you have anything ghc-related in your ~/.stack/config.yaml?

dbaynard on 18 Mar 2020

Tried master version of Stack.
Same result

I have nothing in my ~/.stack/config.yaml

dspies-leapyear on 19 Mar 2020

So I tried nuking everything everywhere

rm -r .stack
rm -r .hoogle
rm -r .cabal
rm -r .ghc
rm -r .local/bin/*

And then re-installing stack and running stack upgrade

and now I try the thing and it _builds_ hoogle, but then get the error:

Couldn't find hoogle in path after installing.  This shouldn't happen, may be a bug.
Hangup: 1

I have to explicitly run stack install hoogle

After which I get the same error I got before

dspies-leapyear on 19 Mar 2020

What version of hoogle are _you_ running?

dspies-leapyear on 19 Mar 2020

@dbaynard Pinging on this again. I'm curious what your setup is to see if I can replicate it as a workaround for now

dspies-leapyear on 14 Apr 2020

Have been having the same problem for a few months now.

fosskers on 30 Apr 2020

I just went through the process of deleting ~/.stack/ and rebuilding everything. Had an empty ./stack-work, a freshly installed hoogle (latest on Hackage), and I still can't get any variants of stack hoogle --server, stack hoogle --rebuild or stack hoogle --setup to succeed.

fosskers on 30 Apr 2020

👍3

Same error with Stack 2.3.1. Cleaned everything.

secsaba on 7 May 2020

Found a workaround:

the key is to use --local=<haddock-dir> instead of --local

cymp:localdoc cyue$ stack hoogle --rebuild
No hoogle version was found, trying to install the latest version
Minimum version is hoogle-5.0. Found acceptable hoogle-5.0.17.15 in your index, requiring its installation.
Rebuilding database ...
Haddock index for local packages and dependencies already up to date at:
/fw/Wander/Haskell/localdoc/.stack-work/install/x86_64-osx/d8fc80d492dbccc03f7819e69e02743a1433ab59849868e540e0d5de125456e0/8.8.3/doc/all/index.html
Haddock index for snapshot packages already up to date at:
/Users/cyue/.stack/snapshots/x86_64-osx/d8fc80d492dbccc03f7819e69e02743a1433ab59849868e540e0d5de125456e0/8.8.3/doc/index.html
Built docs.
Starting generate
Reading ghc-pkg... 0.10s

Packages missing documentation:                 array                 async                 atomic-primops                 attoparsec                 base                 base-orphans                 base64-bytestring                 binary                 blaze-builder                 bytestring                 Cabal                 cabal-doctest                 call-stack                 case-insensitive                 clock                 containers                 data-default-class                 deepseq                 directory                 entropy                 exceptions                 filepath                 ghc                 ghc-boot                 ghc-boot-th                 ghc-compact                 ghc-heap                 ghc-prim                 ghci                 hashable                 haskeline                 hpc                 HUnit                 integer-gmp                 integer-logarithms                 io-streams                 io-streams-haproxy                 libiserv                 lifted-base                 massiv                 megaparsec                 monad-control                 mtl                 neat-interpolation                 network                 network-uri                 old-locale                 parsec                 parser-combinators                 pretty                 primitive                 process                 QuickCheck                 random                 readable                 regex-base                 regex-posix                 repa                 scheduler                 scientific                 SHA                 snap-core                 snap-server                 splitmix                 stm                 streaming-commons                 template-haskell                 terminfo                 text                 time                 transformers                 transformers-base                 transformers-compat                 unix                 unix-compat                 unliftio-core                 unordered-containers                 vector                 websockets                 xhtml                 zlib                 zlib-bindings               bytestring-builder               localdoc            rts
No packages were found, aborting (use no arguments to index all of Stackage)
Received ExitFailure 1 when running
Raw command: /Users/cyue/.local/bin/hoogle generate --local --database=/fw/Wander/Haskell/localdoc/.stack-work/hoogle/x86_64-osx/d8fc80d492dbccc03f7819e69e02743a1433ab59849868e540e0d5de125456e0/8.8.3/database.hoo

cymp:localdoc cyue$ 
cymp:localdoc cyue$ 
cymp:localdoc cyue$ stack exec bash
bash-5.0$ 
bash-5.0$ 
bash-5.0$ hoogle generate --local=/fw/Wander/Haskell/localdoc/.stack-work/install/x86_64-osx/d8fc80d492dbccc03f7819e69e02743a1433ab59849868e540e0d5de125456e0/8.8.3/doc --local=/Users/cyue/.stack/snapshots/x86_64-osx/d8fc80d492dbccc03f7819e69e02743a1433ab59849868e540e0d5de125456e0/8.8.3/doc --database=/fw/Wander/Haskell/localdoc/.stack-work/hoogle/x86_64-osx/d8fc80d492dbccc03f7819e69e02743a1433ab59849868e540e0d5de125456e0/8.8.3/database.hoo
Starting generate
[3/82] QuickCheck... 0.11s
[9/82] base... 1.15s          
[26/82] ghc... 3.21s               
[42/82] massiv... 0.23s            
[67/82] template-haskell... 0.22s  
[81/82] zlib... 0.04s                
[90/82] base... 1.20s          
[107/82] ghc-prim... 0.45s          
[135/82] snap-core... 0.12s         
[151/82] vector... 0.33s              
[154/82] zlib-bindings... 0.01s
Found 204 warnings when processing items

Reordering items... 0.04s
Writing tags... 0.28s
Writing names... 0.14s
Writing types... 1.22s
Took 16.50s
bash-5.0$ 
bash-5.0$ 
bash-5.0$ exit
exit
cymp:localdoc cyue$ 
cymp:localdoc cyue$ 
cymp:localdoc cyue$ stack hoogle --server
No hoogle version was found, trying to install the latest version
Minimum version is hoogle-5.0. Found acceptable hoogle-5.0.17.15 in your index, requiring its installation.
Server started on port 8080
Reading log...0.00s
2020-05-13T16:43:29.220866 - Server starting on port 8080 and host/IP Host "127.0.0.1"
...

complyue on 13 May 2020

👍1

stack: Version 2.3.1, Git revision de2a7b694f07de7e6cf17f8c92338c16286b2878 (8103 commits) x86_64 hpack-0.33.0
lts: lts-15.11

I was able to use the workaround posted above to at least get past this bug by cleanly doing the following all in a ubuntu 18.04 container, however it still runs into strange issues toward the end

stack clean
stack haddock
At this point the documentation works, and I can even service on an nginx elsewhere.
Then i try to get hoogle working by doing the following
stack install hoogle
hoogle generate -v --download --local=$(stack path --local-doc-root) --local=$(stack path --snapshot-doc-root) --database=$(stack path --local-hoogle-root)/database.hoo

The generation seems to get past the ExitFailure 1 in this particular bug, however the following serves with really broken links (i have tried many combinations of flags all to the same avail)
hoogle server --local --host "*" --port=12345 --haddock=$(stack path --local-doc-root) --haddock=$(stack path --snapshot-doc-root) --database=$(stack path --local-hoogle-root)/database.hoo
All the links hoogle serves end up being of the form haddockfile:///PATH_TO_SOMEWHERE and the browser has no idea how to serve them.

I'm not sure this is the right place to reply with all this, but I imagine this is caused by the workaround of having to call hoogle by hand.

Is there any magic stack would normally be doing that I'm missing by having to workaround this bug?

The end result is I'd like to take the hoogle database (and haddock docs) and deploy them to a production environment somehow, but I am so far unable to even get it to work locally.

merc1031 on 16 May 2020

Hi @merc1031,

What works for me is a slightly different hoogle generate and hoogle server invocation than you used. I include my full script for completeness:

This is fish shell syntax but I'm sure you can convert it to bash or your shell of choice.

stack haddock

set LOCAL_DOC_ROOT (stack path --local-doc-root)
set SNAPSHOT_DOC (stack path --snapshot-doc-root)
set DATABASE (stack path --local-hoogle-root)/database.foo

stack exec -- hoogle generate --local=$LOCAL_DOC_ROOT --local=$SNAPSHOT_DOC --database=$DATABASE

hoogle server --local --port=9876 --database=$DATABASE

And then I can connect to it through my browser at http://localhost:9876/

I hope that helps.

Versions:

hoogle --version
Hoogle 5.0.17.15

stack --version
Version 2.3.1, Git revision de2a7b694f07de7e6cf17f8c92338c16286b2878 (8103 commits) x86_64 hpack-0.33.0

resolver: lts-15.12

gittywithexcitement on 17 May 2020

👍6

Thanks @gittywithexcitement, that worked for me too.

To save people the (minimal) effort of converting fish to bash, here is my script:

#!/bin/bash
# Based on code by @gittywithexcitement :
# https://github.com/commercialhaskell/stack/issues/5228#issuecomment-629738842

stack haddock

LOCAL_DOC_ROOT=$(stack path --local-doc-root)
SNAPSHOT_DOC=$(stack path --snapshot-doc-root)
DATABASE="$(stack path --local-hoogle-root)/database.foo"

stack exec -- hoogle generate --local=$LOCAL_DOC_ROOT --local=$SNAPSHOT_DOC --database=$DATABASE

hoogle server --local --port=9876 --database=$DATABASE

Nielius on 31 May 2020

👍6

Thanks for writing this up Nielius! This worked like a charm for me.

alex404 on 11 Jun 2020

In order to get hoogle to generate and serve up a database when enabling nix support, I used the following commands:

$ stack --nix build --haddock
$ stack --nix hoogle -- generate --local=$(stack --nix path --local-doc-root) --local=$(stack --nix path --snapshot-doc-root) --database "$(stack --nix path --local-hoogle-root)/database.hoo"
$ stack --nix hoogle -- server --database "$(stack --nix path --local-hoogle-root)/database.hoo" --local -n