diff --git a/lib/analysis-paths.js b/lib/analysis-paths.js
index 87e625ceb..c892849c3 100644
--- a/lib/analysis-paths.js
+++ b/lib/analysis-paths.js
@@ -1,5 +1,13 @@
 "use strict";
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+    result["default"] = mod;
+    return result;
+};
 Object.defineProperty(exports, "__esModule", { value: true });
+const path = __importStar(require("path"));
 function isInterpretedLanguage(language) {
     return language === "javascript" || language === "python";
 }
@@ -35,8 +43,18 @@ function includeAndExcludeAnalysisPaths(config) {
     if (config.paths.length !== 0) {
         process.env["LGTM_INDEX_INCLUDE"] = buildIncludeExcludeEnvVar(config.paths);
     }
-    if (config.pathsIgnore.length !== 0) {
-        process.env["LGTM_INDEX_EXCLUDE"] = buildIncludeExcludeEnvVar(config.pathsIgnore);
+    // If the temporary or tools directory is in the working directory ignore that too.
+    const tempRelativeToWorking = path.relative(process.cwd(), config.tempDir);
+    const toolsRelativeToWorking = path.relative(process.cwd(), config.toolCacheDir);
+    let pathsIgnore = config.pathsIgnore;
+    if (!tempRelativeToWorking.startsWith("..")) {
+        pathsIgnore = pathsIgnore.concat(tempRelativeToWorking);
+    }
+    if (!toolsRelativeToWorking.startsWith("..")) {
+        pathsIgnore = pathsIgnore.concat(toolsRelativeToWorking);
+    }
+    if (pathsIgnore.length !== 0) {
+        process.env["LGTM_INDEX_EXCLUDE"] = buildIncludeExcludeEnvVar(pathsIgnore);
     }
     // The 'LGTM_INDEX_FILTERS' environment variable controls which files are
     // extracted or ignored. It does not control which directories are traversed.
diff --git a/lib/analysis-paths.js.map b/lib/analysis-paths.js.map
index f846d4c2e..cf4cbe259 100644
--- a/lib/analysis-paths.js.map
+++ b/lib/analysis-paths.js.map
@@ -1 +1 @@
-{"version":3,"file":"analysis-paths.js","sourceRoot":"","sources":["../src/analysis-paths.ts"],"names":[],"mappings":";;AAGA,SAAS,qBAAqB,CAAC,QAAQ;IACrC,OAAO,QAAQ,KAAK,YAAY,IAAI,QAAQ,KAAK,QAAQ,CAAC;AAC5D,CAAC;AAED,6FAA6F;AAChF,QAAA,+BAA+B,GAAG,cAAc,CAAC;AAE9D,uFAAuF;AACvF,SAAS,yBAAyB,CAAC,KAAe;IAChD,iCAAiC;IACjC,KAAK,GAAG,KAAK,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC,GAAG,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;IAEnD,uDAAuD;IACvD,IAAI,OAAO,CAAC,QAAQ,KAAK,OAAO,EAAE;QAChC,KAAK,GAAG,KAAK,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,KAAK,CAAC,uCAA+B,CAAC,CAAC,CAAC;KACvE;IAED,OAAO,KAAK,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;AAC1B,CAAC;AAED,SAAgB,uBAAuB,CACrC,MAA0B,EAC1B,MAAc;IAEd,oEAAoE;IACpE,sEAAsE;IACtE,IACE,CAAC,MAAM,CAAC,KAAK,CAAC,MAAM,KAAK,CAAC,IAAI,MAAM,CAAC,WAAW,CAAC,MAAM,KAAK,CAAC,CAAC;QAC9D,CAAC,MAAM,CAAC,SAAS,CAAC,KAAK,CAAC,qBAAqB,CAAC,EAC9C;QACA,MAAM,CAAC,OAAO,CACZ,4FAA4F,CAC7F,CAAC;KACH;AACH,CAAC;AAdD,0DAcC;AAED,SAAgB,8BAA8B,CAAC,MAA0B;IACvE,0EAA0E;IAC1E,+DAA+D;IAC/D,sEAAsE;IACtE,qDAAqD;IACrD,gFAAgF;IAChF,sEAAsE;IACtE,sDAAsD;IACtD,IAAI,MAAM,CAAC,KAAK,CAAC,MAAM,KAAK,CAAC,EAAE;QAC7B,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,GAAG,yBAAyB,CAAC,MAAM,CAAC,KAAK,CAAC,CAAC;KAC7E;IACD,IAAI,MAAM,CAAC,WAAW,CAAC,MAAM,KAAK,CAAC,EAAE;QACnC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,GAAG,yBAAyB,CAC3D,MAAM,CAAC,WAAW,CACnB,CAAC;KACH;IAED,yEAAyE;IACzE,6EAA6E;IAC7E,wDAAwD;IACxD,MAAM,OAAO,GAAa,EAAE,CAAC;IAC7B,OAAO,CAAC,IAAI,CAAC,GAAG,MAAM,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,WAAW,CAAC,EAAE,CAAC,CAAC,CAAC;IACzD,OAAO,CAAC,IAAI,CAAC,GAAG,MAAM,CAAC,WAAW,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,WAAW,CAAC,EAAE,CAAC,CAAC,CAAC;IAC/D,IAAI,OAAO,CAAC,MAAM,KAAK,CAAC,EAAE;QACxB,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,GAAG,OAAO,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;KACxD;AACH,CAAC;AA1BD,wEA0BC"}
\ No newline at end of file
+{"version":3,"file":"analysis-paths.js","sourceRoot":"","sources":["../src/analysis-paths.ts"],"names":[],"mappings":";;;;;;;;;AAAA,2CAA6B;AAK7B,SAAS,qBAAqB,CAAC,QAAQ;IACrC,OAAO,QAAQ,KAAK,YAAY,IAAI,QAAQ,KAAK,QAAQ,CAAC;AAC5D,CAAC;AAED,6FAA6F;AAChF,QAAA,+BAA+B,GAAG,cAAc,CAAC;AAE9D,uFAAuF;AACvF,SAAS,yBAAyB,CAAC,KAAe;IAChD,iCAAiC;IACjC,KAAK,GAAG,KAAK,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC,GAAG,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;IAEnD,uDAAuD;IACvD,IAAI,OAAO,CAAC,QAAQ,KAAK,OAAO,EAAE;QAChC,KAAK,GAAG,KAAK,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,KAAK,CAAC,uCAA+B,CAAC,CAAC,CAAC;KACvE;IAED,OAAO,KAAK,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;AAC1B,CAAC;AAED,SAAgB,uBAAuB,CACrC,MAA0B,EAC1B,MAAc;IAEd,oEAAoE;IACpE,sEAAsE;IACtE,IACE,CAAC,MAAM,CAAC,KAAK,CAAC,MAAM,KAAK,CAAC,IAAI,MAAM,CAAC,WAAW,CAAC,MAAM,KAAK,CAAC,CAAC;QAC9D,CAAC,MAAM,CAAC,SAAS,CAAC,KAAK,CAAC,qBAAqB,CAAC,EAC9C;QACA,MAAM,CAAC,OAAO,CACZ,4FAA4F,CAC7F,CAAC;KACH;AACH,CAAC;AAdD,0DAcC;AAED,SAAgB,8BAA8B,CAAC,MAA0B;IACvE,0EAA0E;IAC1E,+DAA+D;IAC/D,sEAAsE;IACtE,qDAAqD;IACrD,gFAAgF;IAChF,sEAAsE;IACtE,sDAAsD;IACtD,IAAI,MAAM,CAAC,KAAK,CAAC,MAAM,KAAK,CAAC,EAAE;QAC7B,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,GAAG,yBAAyB,CAAC,MAAM,CAAC,KAAK,CAAC,CAAC;KAC7E;IACD,mFAAmF;IACnF,MAAM,qBAAqB,GAAG,IAAI,CAAC,QAAQ,CAAC,OAAO,CAAC,GAAG,EAAE,EAAE,MAAM,CAAC,OAAO,CAAC,CAAC;IAC3E,MAAM,sBAAsB,GAAG,IAAI,CAAC,QAAQ,CAC1C,OAAO,CAAC,GAAG,EAAE,EACb,MAAM,CAAC,YAAY,CACpB,CAAC;IACF,IAAI,WAAW,GAAG,MAAM,CAAC,WAAW,CAAC;IACrC,IAAI,CAAC,qBAAqB,CAAC,UAAU,CAAC,IAAI,CAAC,EAAE;QAC3C,WAAW,GAAG,WAAW,CAAC,MAAM,CAAC,qBAAqB,CAAC,CAAC;KACzD;IACD,IAAI,CAAC,sBAAsB,CAAC,UAAU,CAAC,IAAI,CAAC,EAAE;QAC5C,WAAW,GAAG,WAAW,CAAC,MAAM,CAAC,sBAAsB,CAAC,CAAC;KAC1D;IACD,IAAI,WAAW,CAAC,MAAM,KAAK,CAAC,EAAE;QAC5B,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,GAAG,yBAAyB,CAAC,WAAW,CAAC,CAAC;KAC5E;IAED,yEAAyE;IACzE,6EAA6E;IAC7E,wDAAwD;IACxD,MAAM,OAAO,GAAa,EAAE,CAAC;IAC7B,OAAO,CAAC,IAAI,CAAC,GAAG,MAAM,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,WAAW,CAAC,EAAE,CAAC,CAAC,CAAC;IACzD,OAAO,CAAC,IAAI,CAAC,GAAG,MAAM,CAAC,WAAW,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,WAAW,CAAC,EAAE,CAAC,CAAC,CAAC;IAC/D,IAAI,OAAO,CAAC,MAAM,KAAK,CAAC,EAAE;QACxB,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,GAAG,OAAO,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC;KACxD;AACH,CAAC;AArCD,wEAqCC"}
\ No newline at end of file
diff --git a/lib/analysis-paths.test.js b/lib/analysis-paths.test.js
index 1c5263738..5f03a279c 100644
--- a/lib/analysis-paths.test.js
+++ b/lib/analysis-paths.test.js
@@ -1,7 +1,4 @@
 "use strict";
-var __importDefault = (this && this.__importDefault) || function (mod) {
-    return (mod && mod.__esModule) ? mod : { "default": mod };
-};
 var __importStar = (this && this.__importStar) || function (mod) {
     if (mod && mod.__esModule) return mod;
     var result = {};
@@ -9,7 +6,11 @@ var __importStar = (this && this.__importStar) || function (mod) {
     result["default"] = mod;
     return result;
 };
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
 Object.defineProperty(exports, "__esModule", { value: true });
+const path = __importStar(require("path"));
 const ava_1 = __importDefault(require("ava"));
 const analysisPaths = __importStar(require("./analysis-paths"));
 const testing_utils_1 = require("./testing-utils");
@@ -51,4 +52,23 @@ ava_1.default("nonEmptyPaths", async (t) => {
         t.is(process.env["LGTM_INDEX_FILTERS"], "include:path1\ninclude:path2\ninclude:**/path3\nexclude:path4\nexclude:path5\nexclude:path6/**");
     });
 });
+ava_1.default("exclude temp dir", async (t) => {
+    return await util.withTmpDir(async (toolCacheDir) => {
+        const tempDir = path.join(process.cwd(), "codeql-runner-temp");
+        const config = {
+            languages: [],
+            queries: {},
+            pathsIgnore: [],
+            paths: [],
+            originalUserInput: {},
+            tempDir,
+            toolCacheDir,
+            codeQLCmd: "",
+        };
+        analysisPaths.includeAndExcludeAnalysisPaths(config);
+        t.is(process.env["LGTM_INDEX_INCLUDE"], undefined);
+        t.is(process.env["LGTM_INDEX_EXCLUDE"], "codeql-runner-temp");
+        t.is(process.env["LGTM_INDEX_FILTERS"], undefined);
+    });
+});
 //# sourceMappingURL=analysis-paths.test.js.map
\ No newline at end of file
diff --git a/lib/analysis-paths.test.js.map b/lib/analysis-paths.test.js.map
index 5feb620b9..02f9e031c 100644
--- a/lib/analysis-paths.test.js.map
+++ b/lib/analysis-paths.test.js.map
@@ -1 +1 @@
-{"version":3,"file":"analysis-paths.test.js","sourceRoot":"","sources":["../src/analysis-paths.test.ts"],"names":[],"mappings":";;;;;;;;;;;;AAAA,8CAAuB;AAEvB,gEAAkD;AAClD,mDAA6C;AAC7C,6CAA+B;AAE/B,0BAAU,CAAC,aAAI,CAAC,CAAC;AAEjB,aAAI,CAAC,YAAY,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC7B,OAAO,MAAM,IAAI,CAAC,UAAU,CAAC,KAAK,EAAE,MAAM,EAAE,EAAE;QAC5C,MAAM,MAAM,GAAG;YACb,SAAS,EAAE,EAAE;YACb,OAAO,EAAE,EAAE;YACX,WAAW,EAAE,EAAE;YACf,KAAK,EAAE,EAAE;YACT,iBAAiB,EAAE,EAAE;YACrB,OAAO,EAAE,MAAM;YACf,YAAY,EAAE,MAAM;YACpB,SAAS,EAAE,EAAE;SACd,CAAC;QACF,aAAa,CAAC,8BAA8B,CAAC,MAAM,CAAC,CAAC;QACrD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;QACnD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;QACnD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;IACrD,CAAC,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,eAAe,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAChC,OAAO,MAAM,IAAI,CAAC,UAAU,CAAC,KAAK,EAAE,MAAM,EAAE,EAAE;QAC5C,MAAM,MAAM,GAAG;YACb,SAAS,EAAE,EAAE;YACb,OAAO,EAAE,EAAE;YACX,KAAK,EAAE,CAAC,OAAO,EAAE,OAAO,EAAE,UAAU,CAAC;YACrC,WAAW,EAAE,CAAC,OAAO,EAAE,OAAO,EAAE,UAAU,CAAC;YAC3C,iBAAiB,EAAE,EAAE;YACrB,OAAO,EAAE,MAAM;YACf,YAAY,EAAE,MAAM;YACpB,SAAS,EAAE,EAAE;SACd,CAAC;QACF,aAAa,CAAC,8BAA8B,CAAC,MAAM,CAAC,CAAC;QACrD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,cAAc,CAAC,CAAC;QACxD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,cAAc,CAAC,CAAC;QACxD,CAAC,CAAC,EAAE,CACF,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EACjC,gGAAgG,CACjG,CAAC;IACJ,CAAC,CAAC,CAAC;AACL,CAAC,CAAC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"analysis-paths.test.js","sourceRoot":"","sources":["../src/analysis-paths.test.ts"],"names":[],"mappings":";;;;;;;;;;;;AAAA,2CAA6B;AAE7B,8CAAuB;AAEvB,gEAAkD;AAClD,mDAA6C;AAC7C,6CAA+B;AAE/B,0BAAU,CAAC,aAAI,CAAC,CAAC;AAEjB,aAAI,CAAC,YAAY,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC7B,OAAO,MAAM,IAAI,CAAC,UAAU,CAAC,KAAK,EAAE,MAAM,EAAE,EAAE;QAC5C,MAAM,MAAM,GAAG;YACb,SAAS,EAAE,EAAE;YACb,OAAO,EAAE,EAAE;YACX,WAAW,EAAE,EAAE;YACf,KAAK,EAAE,EAAE;YACT,iBAAiB,EAAE,EAAE;YACrB,OAAO,EAAE,MAAM;YACf,YAAY,EAAE,MAAM;YACpB,SAAS,EAAE,EAAE;SACd,CAAC;QACF,aAAa,CAAC,8BAA8B,CAAC,MAAM,CAAC,CAAC;QACrD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;QACnD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;QACnD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;IACrD,CAAC,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,eAAe,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAChC,OAAO,MAAM,IAAI,CAAC,UAAU,CAAC,KAAK,EAAE,MAAM,EAAE,EAAE;QAC5C,MAAM,MAAM,GAAG;YACb,SAAS,EAAE,EAAE;YACb,OAAO,EAAE,EAAE;YACX,KAAK,EAAE,CAAC,OAAO,EAAE,OAAO,EAAE,UAAU,CAAC;YACrC,WAAW,EAAE,CAAC,OAAO,EAAE,OAAO,EAAE,UAAU,CAAC;YAC3C,iBAAiB,EAAE,EAAE;YACrB,OAAO,EAAE,MAAM;YACf,YAAY,EAAE,MAAM;YACpB,SAAS,EAAE,EAAE;SACd,CAAC;QACF,aAAa,CAAC,8BAA8B,CAAC,MAAM,CAAC,CAAC;QACrD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,cAAc,CAAC,CAAC;QACxD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,cAAc,CAAC,CAAC;QACxD,CAAC,CAAC,EAAE,CACF,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EACjC,gGAAgG,CACjG,CAAC;IACJ,CAAC,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,kBAAkB,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IACnC,OAAO,MAAM,IAAI,CAAC,UAAU,CAAC,KAAK,EAAE,YAAY,EAAE,EAAE;QAClD,MAAM,OAAO,GAAG,IAAI,CAAC,IAAI,CAAC,OAAO,CAAC,GAAG,EAAE,EAAE,oBAAoB,CAAC,CAAC;QAC/D,MAAM,MAAM,GAAG;YACb,SAAS,EAAE,EAAE;YACb,OAAO,EAAE,EAAE;YACX,WAAW,EAAE,EAAE;YACf,KAAK,EAAE,EAAE;YACT,iBAAiB,EAAE,EAAE;YACrB,OAAO;YACP,YAAY;YACZ,SAAS,EAAE,EAAE;SACd,CAAC;QACF,aAAa,CAAC,8BAA8B,CAAC,MAAM,CAAC,CAAC;QACrD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;QACnD,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,oBAAoB,CAAC,CAAC;QAC9D,CAAC,CAAC,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,EAAE,SAAS,CAAC,CAAC;IACrD,CAAC,CAAC,CAAC;AACL,CAAC,CAAC,CAAC"}
\ No newline at end of file
diff --git a/src/analysis-paths.test.ts b/src/analysis-paths.test.ts
index c84c343d8..96c2719fd 100644
--- a/src/analysis-paths.test.ts
+++ b/src/analysis-paths.test.ts
@@ -1,3 +1,5 @@
+import * as path from "path";
+
 import test from "ava";
 
 import * as analysisPaths from "./analysis-paths";
@@ -46,3 +48,23 @@ test("nonEmptyPaths", async (t) => {
     );
   });
 });
+
+test("exclude temp dir", async (t) => {
+  return await util.withTmpDir(async (toolCacheDir) => {
+    const tempDir = path.join(process.cwd(), "codeql-runner-temp");
+    const config = {
+      languages: [],
+      queries: {},
+      pathsIgnore: [],
+      paths: [],
+      originalUserInput: {},
+      tempDir,
+      toolCacheDir,
+      codeQLCmd: "",
+    };
+    analysisPaths.includeAndExcludeAnalysisPaths(config);
+    t.is(process.env["LGTM_INDEX_INCLUDE"], undefined);
+    t.is(process.env["LGTM_INDEX_EXCLUDE"], "codeql-runner-temp");
+    t.is(process.env["LGTM_INDEX_FILTERS"], undefined);
+  });
+});
diff --git a/src/analysis-paths.ts b/src/analysis-paths.ts
index 084719b19..071505490 100644
--- a/src/analysis-paths.ts
+++ b/src/analysis-paths.ts
@@ -1,3 +1,5 @@
+import * as path from "path";
+
 import * as configUtils from "./config-utils";
 import { Logger } from "./logging";
 
@@ -48,10 +50,21 @@ export function includeAndExcludeAnalysisPaths(config: configUtils.Config) {
   if (config.paths.length !== 0) {
     process.env["LGTM_INDEX_INCLUDE"] = buildIncludeExcludeEnvVar(config.paths);
   }
-  if (config.pathsIgnore.length !== 0) {
-    process.env["LGTM_INDEX_EXCLUDE"] = buildIncludeExcludeEnvVar(
-      config.pathsIgnore
-    );
+  // If the temporary or tools directory is in the working directory ignore that too.
+  const tempRelativeToWorking = path.relative(process.cwd(), config.tempDir);
+  const toolsRelativeToWorking = path.relative(
+    process.cwd(),
+    config.toolCacheDir
+  );
+  let pathsIgnore = config.pathsIgnore;
+  if (!tempRelativeToWorking.startsWith("..")) {
+    pathsIgnore = pathsIgnore.concat(tempRelativeToWorking);
+  }
+  if (!toolsRelativeToWorking.startsWith("..")) {
+    pathsIgnore = pathsIgnore.concat(toolsRelativeToWorking);
+  }
+  if (pathsIgnore.length !== 0) {
+    process.env["LGTM_INDEX_EXCLUDE"] = buildIncludeExcludeEnvVar(pathsIgnore);
   }
 
   // The 'LGTM_INDEX_FILTERS' environment variable controls which files are