Questions tagged [haskell-stack]
Questions about the Stack, a build tool for the Haskell language. Do not use this tag for general Haskell questions that do not involve Stack.
haskell-stack
1,284
questions
0
votes
0
answers
25
views
How to use Niv to build a Stack project?
I'm working on a Haskell project using NixOS and Stack as the dependency manager. However, I'm having trouble specifying GHC version 8.8.4.
To solve the version problem, I am trying to use Niv with ...
1
vote
1
answer
36
views
hint runStmt no output when redirected
Following this link and trying to stack run this module:
module Main where
import Language.Haskell.Interpreter
main :: IO ()
main = do
_ <- runInterpreter
$ setImports ["Prelude"]...
- 55
0
votes
0
answers
75
views
Haskell program not finding student in database despite correct ID
I'm encountering an issue with my Haskell program where it's unable to find a student in the database despite providing the correct student ID.
Details:
Objective: My program is designed to search for ...
- 19
0
votes
0
answers
54
views
Haskell, Stack, importing module shows error "Module not found" [duplicate]
If i write import in .hs file, it pops error saying no module found for "Lib" and "import Numeric.LinearAlgebra ( (><), linearSolve )". Also i got error saying ambiguous type....
1
vote
1
answer
44
views
Stack error when running benchmarks (tasty-bench)
I try to include some benchmarks in my Haskell package and running stack bench generates an error:
Benchmark benchmarks: RUNNING...
All
Fibonacci numbers
fifth: OK (4.28s)
247 ns ± ...
- 83.5k
0
votes
1
answer
59
views
How to specify c/c++ compiler on stack install command
I'm learning Haskell and I'm setting up my system for development.
I'm on MacOS and trying to install hoogle locally with stack install hoogle fails because the compilation of some libraries fails ...
- 11
0
votes
1
answer
134
views
Is it safe to downgrade Haskell stack version?
Suppose I'd like to build an old stack project from GitHub (which uses snapshot before lts-12.0), can I build it with latest stack? I did some experiments as follows.
For example, hpack-convert uses ...
- 1,409
2
votes
1
answer
127
views
What am I doing wrong in my Haskell library installation/usage?
I want to install and run an example program from the Haskell neural library.
I'm pretty new to this and am not sure on whether the issue is with my installation method, my environment or the library(...
2
votes
1
answer
675
views
Haskell language server tries to use incorrect GHC version
I'm trying to use Haskell language server in Spacemacs. I installed HLS using ghcup. My operating system is Ubuntu 20.04.5. When opening a hs-file in Spacemacs, I get the following error message:
No '...
- 21
2
votes
1
answer
430
views
Haskell stack local install fails after installing GHC
I am trying to install stack locally (I am on a university account, and can not make a systemwide install). I am following the manual install instructions. I am on a Red Hat system.
Here is the ...
- 12.7k
-1
votes
2
answers
88
views
Yesod fails to run on docker
I'm trying to build yesod according to the docs on docker:
# Dockerfile
FROM ubuntu:22.04
RUN apt-get update
RUN apt-get install curl -y
RUN curl -sSL https://get.haskellstack.org/ | sh
RUN stack new ...
- 6,770
2
votes
2
answers
470
views
How to install package for Haskell with stack and cabal?
I'm attempting to install one small Haskell package.
I set up a project using stack:
stack new my-project simple
This worked out fine. I'm able to build and run the code.
But then I stumbled into ...
- 13.9k
0
votes
1
answer
189
views
Is possible code haskell and run it in github codespace?
I am discovering the github codespace and I think it is a wonderful tool to code and practice coding.
As far as I know, the codespace can run python, java, js and html natively. Searching about the ...
2
votes
2
answers
138
views
Scotty: No instance for MonadIO ScottyT (arising from a use of ‘liftIO’)
I am trying to learn HASKELL by myself, I have found this page https://www.parsonsmatt.org/2015/05/02/scotty_and_persistent.html
and I have tried to use the code but I got an error:
share [mkPersist ...
- 1,244
1
vote
2
answers
76
views
understand haskell logic behind odd's and even's index lists
I had a question in haskell that asks a function to divide a list in two different lists so the even indexs filled a list and the odd ones another.
Example:
func :: [Int] -> ([Int], [Int])
Then, ...