diff --git a/build/devShellHook.sh b/build/devShellHook.sh
new file mode 100644
index 0000000..b9da24e
--- /dev/null
+++ b/build/devShellHook.sh
@@ -0,0 +1,28 @@
+set -e
+
+log() {
+  printf '\e[1m\e[38;5;87m==>\e[0m\e[1m %s.\e[0m\n' "$*"
+}
+
+log "Checking for existing postgres directory"
+[ -d ./matabas-db ] || {
+  log "Non-existent, creating postgres directory (./matabas-db)"
+  pg_ctl initdb --pgdata=./matabas-db
+}
+
+[ -f matabas-db/matabas.log ] && {
+  log "Moving logs from last session into log archive (./matabas-db/matabas.log.old)"
+  cat matabas-db/matabas.log >> matabas-db/matabas.log.old
+  rm -f matabas-db/matabas.log
+}
+
+log "Starting postgres"
+pg_ctl start --pgdata=./matabas-db --log=./matabas-db/matabas.log --options="-p 2137 -k /tmp"
+trap 'log "Stopping postgres" && pg_ctl stop --pgdata=./matabas-db' EXIT
+
+log "Creating database"
+createdb -p 2137 matabas 2>>./matabas-db/matabas.log || log "Database already exists, not overwriting"
+
+log "Environment ready!"
+
+set +e
diff --git a/flake.nix b/flake.nix
index 80c7464..6f2f273 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,36 +17,7 @@
         };
         devShells.default = pkgs.mkShell {
           packages = [ packages.default packages.postgres ];
-          shellHook = ''
-            set -e
-
-            log() {
-              printf '\e[1m\e[38;5;87m==>\e[0m\e[1m %s.\e[0m\n' "$*"
-            }
-
-            log "Checking for existing postgres directory"
-            [ -d ./matabas-db ] || {
-              log "Non-existent, creating postgres directory (./matabas-db)"
-              pg_ctl initdb --pgdata=./matabas-db
-            }
-
-            [ -f matabas-db/matabas.log ] && {
-              log "Moving logs from last session into log archive (./matabas-db/matabas.log.old)"
-              cat matabas-db/matabas.log >> matabas-db/matabas.log.old
-              rm -f matabas-db/matabas.log
-            }
-
-            log "Starting postgres"
-            pg_ctl start --pgdata=./matabas-db --log=./matabas-db/matabas.log --options="-p 2137 -k /tmp"
-            trap 'log "Stopping postgres" && pg_ctl stop --pgdata=./matabas-db' EXIT
-
-            log "Creating database"
-            createdb -p 2137 matabas 2>>./matabas-db/matabas.log || log "Database already exists, not overwriting"
-
-            log "Environment ready!"
-
-            set +e
-          '';
+          shellHook = builtins.readFile ./build/devShellHook.sh ;
         };
       }
     ) // {