diff --git a/.ci/compile.sh b/.ci/compile.sh
index bd8c900c8..4d79a9f77 100755
--- a/.ci/compile.sh
+++ b/.ci/compile.sh
@@ -327,4 +327,30 @@ if [[ $MAKE_PACKAGE ]]; then
     BUILD_DIR="$BUILD_DIR" .ci/name_build.sh "$PACKAGE_SUFFIX"
     echo "::endgroup::"
   fi
+
+  if [[ $RUNNER_OS == Windows ]]; then
+    echo "::group::Check installer for build-tree artifacts"
+    cd "$BUILD_DIR"
+    package="$(find . -maxdepth 1 -type f -name 'Cockatrice-*.exe' -print -quit)"
+    if [[ ! $package ]]; then
+      echo "::error file=$0::could not find installer to inspect"
+      exit 1
+    fi
+    seven_zip="$(command -v 7z || true)"
+    if [[ ! $seven_zip ]]; then
+      seven_zip="/c/Program Files/7-Zip/7z.exe"
+    fi
+    if [[ ! -f $seven_zip ]]; then
+      echo "::warning file=$0::7-Zip not found, skipping installer content check"
+    else
+      echo "Inspecting $package"
+      if "$seven_zip" l "$package" |
+        grep -E "_autogen|\.dir[\\/]|\.tlog|(^|[\\/])x64[\\/]|(^|[\\/])\.qt[\\/]|(^|[\\/])\.qsb[\\/]|(^|[\\/])\.lupdate[\\/]|CMakeFiles"; then
+        echo "::error file=$0::installer contains build-tree artifacts"
+        exit 1
+      fi
+      echo "Installer content is clean."
+    fi
+    echo "::endgroup::"
+  fi
 fi
diff --git a/cmake/NSIS.template.in b/cmake/NSIS.template.in
index 5af116470..b3cbcece8 100644
--- a/cmake/NSIS.template.in
+++ b/cmake/NSIS.template.in
@@ -387,19 +387,14 @@ SectionEnd
 
 Section "un.Application" UnSecApplication
 	SetShellVarContext all
-	RMDir /r "$INSTDIR\plugins"
-	RMDir /r "$INSTDIR\sounds"
-	RMDir /r "$INSTDIR\themes"
-	RMDir /r "$INSTDIR\translations"
-	Delete "$INSTDIR\*.exe"
-	Delete "$INSTDIR\*.dll"
-	Delete "$INSTDIR\qt.conf"
-	Delete "$INSTDIR\qdebug.txt"
-	Delete "$INSTDIR\servatrice.sql"
-	Delete "$INSTDIR\servatrice.ini.example"
-	RMDir "$INSTDIR"
 
-	RMDir "$SMPROGRAMS\Cockatrice"
+	; Remove the entire application directory so any file that is not part of
+	; the installed payload (e.g. build-tree artifacts such as *.dir folders,
+	; *_autogen and *.tlog files from a build) cannot survive between an
+	; uninstall and a fresh reinstall.
+	RMDir /r "$INSTDIR"
+
+	RMDir /r "$SMPROGRAMS\Cockatrice"
 
 	DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice"
 SectionEnd
diff --git a/cockatrice/CMakeLists.txt b/cockatrice/CMakeLists.txt
index 4263fc6e2..1ca7089f5 100644
--- a/cockatrice/CMakeLists.txt
+++ b/cockatrice/CMakeLists.txt
@@ -656,17 +656,34 @@ if(WIN32)
   set(qtconf_dest_dir .)
 
   install(
-    DIRECTORY "${CMAKE_BINARY_DIR}/${PROJECT_NAME}/${CMAKE_BUILD_TYPE}/"
+    DIRECTORY "$<TARGET_FILE_DIR:cockatrice>/"
     DESTINATION ./
     FILES_MATCHING
     PATTERN "*.dll"
+    PATTERN "*.pdb" EXCLUDE
+    PATTERN "*.dir*" EXCLUDE
+    PATTERN "*_autogen*" EXCLUDE
+    PATTERN "*.tlog*" EXCLUDE
+    PATTERN "CMakeFiles*" EXCLUDE
+    PATTERN "x64*" EXCLUDE
+    PATTERN ".qt*" EXCLUDE
+    PATTERN ".qsb*" EXCLUDE
+    PATTERN ".lupdate*" EXCLUDE
   )
 
   install(
     DIRECTORY "${CMAKE_BINARY_DIR}/cockatrice/"
     DESTINATION ./
     FILES_MATCHING
-    PATTERN "CMakeFiles" EXCLUDE
+    PATTERN "CMakeFiles*" EXCLUDE
+    PATTERN "*.dir*" EXCLUDE
+    PATTERN "*_autogen*" EXCLUDE
+    PATTERN "*.tlog*" EXCLUDE
+    PATTERN "*.pdb" EXCLUDE
+    PATTERN "x64*" EXCLUDE
+    PATTERN ".qt*" EXCLUDE
+    PATTERN ".qsb*" EXCLUDE
+    PATTERN ".lupdate*" EXCLUDE
     PATTERN "*.ini"
   )
 
@@ -720,10 +737,6 @@ Data = Resources\")
         "
     COMPONENT Runtime
   )
-
-  if(OPENSSL_FOUND)
-    install(FILES ${OPENSSL_INCLUDE_DIRS} DESTINATION ./)
-  endif()
 endif()
 
 if(Qt6LinguistTools_FOUND)
diff --git a/oracle/CMakeLists.txt b/oracle/CMakeLists.txt
index 392184b6e..a942870b7 100644
--- a/oracle/CMakeLists.txt
+++ b/oracle/CMakeLists.txt
@@ -213,10 +213,19 @@ if(WIN32)
   list(APPEND libSearchDirs ${QT_LIBRARY_DIR})
 
   install(
-    DIRECTORY "${CMAKE_BINARY_DIR}/${PROJECT_NAME}/${CMAKE_BUILD_TYPE}/"
+    DIRECTORY "$<TARGET_FILE_DIR:oracle>/"
     DESTINATION ./
     FILES_MATCHING
     PATTERN "*.dll"
+    PATTERN "*.pdb" EXCLUDE
+    PATTERN "*.dir*" EXCLUDE
+    PATTERN "*_autogen*" EXCLUDE
+    PATTERN "*.tlog*" EXCLUDE
+    PATTERN "CMakeFiles*" EXCLUDE
+    PATTERN "x64*" EXCLUDE
+    PATTERN ".qt*" EXCLUDE
+    PATTERN ".qsb*" EXCLUDE
+    PATTERN ".lupdate*" EXCLUDE
   )
 
   # Qt plugins: iconengines, platforms, styles, tls (Qt6)
diff --git a/servatrice/CMakeLists.txt b/servatrice/CMakeLists.txt
index 68e422d8c..21f71a908 100644
--- a/servatrice/CMakeLists.txt
+++ b/servatrice/CMakeLists.txt
@@ -184,10 +184,19 @@ if(WIN32)
   set(qtconf_dest_dir .)
 
   install(
-    DIRECTORY "${CMAKE_BINARY_DIR}/${PROJECT_NAME}/${CMAKE_BUILD_TYPE}/"
+    DIRECTORY "$<TARGET_FILE_DIR:servatrice>/"
     DESTINATION ./
     FILES_MATCHING
     PATTERN "*.dll"
+    PATTERN "*.pdb" EXCLUDE
+    PATTERN "*.dir*" EXCLUDE
+    PATTERN "*_autogen*" EXCLUDE
+    PATTERN "*.tlog*" EXCLUDE
+    PATTERN "CMakeFiles*" EXCLUDE
+    PATTERN "x64*" EXCLUDE
+    PATTERN ".qt*" EXCLUDE
+    PATTERN ".qsb*" EXCLUDE
+    PATTERN ".lupdate*" EXCLUDE
   )
 
   # Qt plugins: platforms, sqldrivers, tls (Qt6)