these derivations will be built:
  /nix/store/ypl052y6cz69ki5dqwky2jrxbvvs3ycp-yuwnfto.drv
building '/nix/store/ypl052y6cz69ki5dqwky2jrxbvvs3ycp-yuwnfto.drv'...
unpacking sources
unpacking source archive /nix/store/jpbr647i4k8mp2a4grbrzb8db8lbk824-app
source root is app
patching sources
configuring
no configure script, doing nothing
building
echo "building..."
building...
echo /tmp/nix-build-yuwnfto.drv-0
/tmp/nix-build-yuwnfto.drv-0
lein jar
Could not transfer artifact org.clojure:clojure:jar:1.10.0 from/to central (https://repo1.maven.org/maven2/): /var/empty/.m2/repository/org/clojure/clojure/1.10.0/clojure-1.10.0.jar.part.lock (No such file or directory)
Could not transfer artifact org.clojure:clojure:jar:1.10.0 from/to clojars (https://repo.clojars.org/): /var/empty/.m2/repository/org/clojure/clojure/1.10.0/clojure-1.10.0.jar.part.lock (No such file or directory)
Could not transfer artifact org.clojure:clojure:pom:1.10.0 from/to central (https://repo1.maven.org/maven2/): /var/empty/.m2/repository/org/clojure/clojure/1.10.0/clojure-1.10.0.pom.part.lock (No such file or directory)
This could be due to a typo in :dependencies, file system permissions, or network issues.
If you are behind a proxy, try setting the 'http_proxy' environment variable.
make: *** [Makefile:4: all] Error 1
builder for '/nix/store/ypl052y6cz69ki5dqwky2jrxbvvs3ycp-yuwnfto.drv' failed with exit code 2