Clean up nix expressions

nix/docs.nix

@@ -17,14 +17,14 @@ stdenvNoCC.mkDerivation {
   ];
 
   buildPhase = let
-    properties = writeText "sqlite.properties" ''
+    sqliteProperties = writeText "sqlite.properties" ''
       description=SQLite
       driver=org.sqlite.JDBC
       driverPath=${sqlite-jdbc}/share/java/sqlite-jdbc-3.25.2.jar
       connectionSpec=jdbc:sqlite:<db>
     '';
 
-    args = writeText "schemaspy.properties" ''
+    schemaspyProperties = writeText "schemaspy.properties" ''
       schemaspy.cat="%"
       schemaspy.t=sqlite
       schemaspy.sso=true
@@ -37,17 +37,17 @@ stdenvNoCC.mkDerivation {
     runHook preBuild
 
     sqlite3 jadb.sqlite ".schema" > schema.sql
-    cp ${args} ./schemaspy.properties
-    schemaspy -t ${properties}
+    cp "${schemaspyProperties}" ./schemaspy.properties
+    schemaspy -t "${sqliteProperties}"
 
     runHook postBuild
   '';
 
   installPhase = ''
-    runHook preBuild
+    runHook preInstall
 
-    cp -r docs $out
+    cp -r docs "$out"
 
-    runHook postBuild
+    runHook postInstall
   '';
-}
+}