diff --git a/flake.nix b/flake.nix
index 3135de4d..df8708ba 100644
--- a/flake.nix
+++ b/flake.nix
@@ -300,7 +300,7 @@
           export HYDRA_HOME="src/"
           mkdir -p .hydra-data
           export HYDRA_DATA="$(pwd)/.hydra-data"
-          export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;'
+          export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;port=64444'
         '';
       });
 
diff --git a/run-hydra.nix b/run-hydra.nix
index 7012e26e..fc410f43 100644
--- a/run-hydra.nix
+++ b/run-hydra.nix
@@ -9,7 +9,7 @@ mkShell {
     export HYDRA_HOME="src/"
     mkdir -p .hydra-data
     export HYDRA_DATA="$(pwd)/.hydra-data"
-    export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;'
+    export HYDRA_DBI='dbi:Pg:dbname=hydra;host=localhost;port=64444'
 
     exec foreman start
   '';
diff --git a/scripts/start-evaluator.sh b/scripts/start-evaluator.sh
index c0b43cf3..249c4047 100755
--- a/scripts/start-evaluator.sh
+++ b/scripts/start-evaluator.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 # wait for hydra-server to listen
-while ! nc -z localhost 3000; do sleep 1; done
+while ! nc -z localhost 63333; do sleep 1; done
 
-exec hydra-evaluator
+touch .hydra-data/hydra.conf
+HYDRA_CONFIG=$(pwd)/.hydra-data/hydra.conf exec hydra-evaluator
diff --git a/scripts/start-hydra.sh b/scripts/start-hydra.sh
index 70bd9beb..815ee500 100755
--- a/scripts/start-hydra.sh
+++ b/scripts/start-hydra.sh
@@ -1,11 +1,12 @@
 #!/bin/sh
 
 # wait for postgresql to listen
-while ! nc -z localhost 5432; do sleep 1; done
+while ! nc -z localhost 64444; do sleep 1; done
 
-createdb -h $(pwd)/.hydra-data/postgres hydra
+createdb -h $(pwd)/.hydra-data/postgres -p 64444 hydra
 
 hydra-init
 hydra-create-user alice --password foobar --role admin
 
-exec hydra-server
+touch .hydra-data/hydra.conf
+HYDRA_CONFIG=$(pwd)/.hydra-data/hydra.conf exec hydra-server --port 63333
diff --git a/scripts/start-postgres.sh b/scripts/start-postgres.sh
index fae2c4cb..c3fd7669 100755
--- a/scripts/start-postgres.sh
+++ b/scripts/start-postgres.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 
 initdb ./.hydra-data/postgres
-exec postgres -D ./.hydra-data/postgres -k $(pwd)/.hydra-data/postgres
+exec postgres -D ./.hydra-data/postgres -k $(pwd)/.hydra-data/postgres -p 64444
diff --git a/scripts/start-queue-runner.sh b/scripts/start-queue-runner.sh
index 4b2741f7..7c92f4e9 100755
--- a/scripts/start-queue-runner.sh
+++ b/scripts/start-queue-runner.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
-# wait until hydra is listening on port 3000
-while ! nc -z localhost 3000; do sleep 1; done
+# wait until hydra is listening on port 63333
+while ! nc -z localhost 63333; do sleep 1; done
 
-hydra-queue-runner
+touch .hydra-data/hydra.conf
+HYDRA_CONFIG=$(pwd)/.hydra-data/hydra.conf exec hydra-queue-runner