<p>when I built plutus-pioneer-program lecture week2, I got the error like this</p>
<pre><code>/root/.cabal/store/ghc-8.10.7/cardano-crypto-praos-2.1.0.0-6256b7c51bff5ecd7a4cd62d0cae080568903ed67a7b8424037c5be2d1c7a1d9/lib/libHScardano-crypto-praos-2.1.0.0-6256b7c51bff5ecd7a4cd62d0cae080568903ed67a7b8424037c5be2d1c7a1d9.a(Praos.o):ghc_18.c:function cardanozmcryptozmpraoszm2zi1zi0zi0zm6256b7c51bff5ecd7a4cd62d0cae080568903ed67a7b8424037c5be2d1c7a1d9_CardanoziCryptoziVRFziPraos_zdwzdcevalVRF_info:(.text+0xa354): error: undefined reference to 'crypto_vrf_ietfdraft03_proof_to_hash'
</code></pre>
<p>it seems link cardano-crypto-praos error, how to solve it?</p>

CC BY-SA 4.0
2024-01-28T23:19:56.020Z
Which set of instructions are you using to build this? My suspicion is that you have either skipped a step or the instructions are incomplete.
Erik de Castro Lopo
CC BY-SA 4.0
2024-01-29T11:45:44.333Z
I think I didn't skipped some step, I just installed all deps manually, and run 'cabal build'. When I tried to build cardano-node, it is also failed, the same command 'cabal build'
Jinn Zh
CC BY-SA 4.0
2024-01-29T22:38:51.607Z
Following the links from the README file in the `cardano-node` repo leads to this  https://github.com/input-output-hk/cardano-node-wiki/blob/main/docs/getting-started/install.md .I think you missed the "installing libsodium" section and maybe more.
Erik de Castro Lopo
<plutus><plutus-pioneer-program>
Plutus-pioneer-progra cabal build error
# Plutus-pioneer-progra cabal build error

(Asked by: username_0 on 2024-01-27)

when I built plutus-pioneer-program lecture week2, I got the error like this
/root/.cabal/store/ghc-8.10.7/cardano-crypto-praos-2.1.0.0-6256b7c51bff5ecd7a4cd62d0cae080568903ed67a7b8424037c5be2d1c7a1d9/lib/libHScardano-crypto-praos-2.1.0.0-6256b7c51bff5ecd7a4cd62d0cae080568903ed67a7b8424037c5be2d1c7a1d9.a(Praos.o):ghc_18.c:function cardanozmcryptozmpraoszm2zi1zi0zi0zm6256b7c51bff5ecd7a4cd62d0cae080568903ed67a7b8424037c5be2d1c7a1d9_CardanoziCryptoziVRFziPraos_zdwzdcevalVRF_info:(.text+0xa354): error: undefined reference to 'crypto_vrf_ietfdraft03_proof_to_hash'

it seems link cardano-crypto-praos error, how to solve it?

**Tags:** plutus, plutus-pioneer-program
> **Comments:**
> **username_1**: Which set of instructions are you using to build this? My suspicion is that you have either skipped a step or the instructions are incomplete.  
> **username_0**: I think I didn't skipped some step, I just installed all deps manually, and run 'cabal build'. When I tried to build cardano-node, it is also failed, the same command 'cabal build'  
> **username_1**: Following the links from the README file in the `cardano-node` repo leads to this  https://github.com/input-output-hk/cardano-node-wiki/blob/main/docs/getting-started/install.md .I think you missed the "installing libsodium" section and maybe more.  

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## 0 answers

